FORM OF SWING LINE NOTE

Exhibit
      10.6
 
FORM
      OF
SWING
      LINE NOTE

            $
                __________________________

            October
                3, 2006

FOR
      VALUE
      RECEIVED, the undersigned, SIG ACQUISITION CORP., a Delaware corporation
      (“Borrower”), promises to pay to the order of LaSalle Bank National Association
      (“Swing Line Lender”) at the main office of LaSalle Bank National Association,
      as Administrative Agent, as hereinafter defined, at 000 Xxxxx XxXxxxx Xxxxxx,
      Xxxxxxx, Xxxxxxxx 00000, the principal sum of 

DOLLARS

or
      the
      aggregate unpaid principal amount of all Swing Line Loans, as defined in the
      Credit Agreement (as hereinafter defined) made by Swing Line Lender to Borrower
      pursuant to Section 2.2.4
      of the
      Credit Agreement, whichever is less, in lawful money of the United States of
      America on the earlier of the Termination Date, as defined in the Credit
      Agreement, or, with respect to each Swing Line Loan, the Swing Line Loan
      Maturity Date applicable thereto.

As
      used
      herein, “Credit Agreement” means the Credit Agreement dated as of
      October 3, 2006, among Borrower, the Lenders, as defined therein, and
      LaSalle Bank National Association, as arranger and administrative agent for
      the
      Lenders (“Administrative Agent”), as the same may from time to time be amended,
      restated or otherwise modified. Each capitalized term used herein that is
      defined in the Credit Agreement and not otherwise defined herein shall have
      the
      meaning ascribed to it in the Credit Agreement.

Xxxxxxxx
      also promises to pay interest on the unpaid principal amount of each Swing
      Line
      Loan from time to time outstanding, from the date of such Swing Line Loan until
      the payment in full thereof, at the rates per annum that shall be determined
      in
      accordance with the provisions of Section
      4.1(a)
      of the
      Credit Agreement. Such interest shall be payable on each date provided for
      in
      such Section
      4.1(a);
      provided, however, that interest on any principal portion that is not paid
      when
      due shall be payable on demand.

The
      principal sum hereof from time to time and the payments of principal and
      interest thereon, shall be shown on the records of Swing Line Lender by such
      method as Swing Line Lender may generally employ; provided, however, that
      failure to make any such entry shall in no way detract from the obligation
      of
      Borrower under this Note.

If
      this
      Note shall not be paid at maturity, whether such maturity occurs by reason
      of
      lapse of time or by operation of any provision for acceleration of maturity
      contained in the Credit Agreement, the principal hereof and the unpaid interest
      thereon shall bear interest, until paid, at a rate per annum equal to two
      percent (2%) in excess of the rate otherwise applicable thereto. All payments
      of
      principal of and interest on this Note shall be made in immediately available
      funds.

This
      Note
      is the Swing Line Note referred to in the Credit Agreement. Reference is made
      to
      the Credit Agreement for a description of the right of the undersigned to
      anticipate payments hereof, the right of the holder hereof to declare this
      Note
      due prior to its stated maturity, and other terms and conditions upon which
      this
      Note is issued.
 
Except
      as
      expressly provided in the Credit Agreement, Borrower expressly waives
      presentment, demand, protest and notice of any kind. This Note shall be governed
      by and construed in accordance with the laws of the State of New York, without
      regard to conflicts of laws provisions.

JURY
      TRIAL WAIVER.
      XXXXXXXX, TO THE EXTENT PERMITTED BY LAW, HEREBY WAIVES ANY RIGHT TO HAVE A
      JURY
      PARTICIPATE IN RESOLVING ANY DISPUTE, WHETHER SOUNDING IN CONTRACT, TORT OR
      OTHERWISE, AMONG BORROWER, ADMINISTRATIVE AGENT AND THE LENDERS, OR ANY THEREOF,
      ARISING OUT OF, IN CONNECTION WITH, RELATED TO, OR INCIDENTAL TO THE
      RELATIONSHIP ESTABLISHED AMONG THEM IN CONNECTION WITH THIS NOTE OR ANY OTHER
      NOTE OR OTHER INSTRUMENT, DOCUMENT OR AGREEMENT EXECUTED OR DELIVERED IN
      CONNECTION HEREWITH OR THE TRANSACTIONS RELATED THERETO.
 
            SIG
              ACQUISITION
              CORP.
          
            By:  
             
            Name:
            
            Title:
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FORM OF SWING LINE NOTE

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