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 135 South
LaSalle Street, Chicago, Illinois 60603, 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.

Borrower 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.
 

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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. BORROWER, 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:      

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  Name:    

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Title:
 

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