I am just about to send my evidence for the 751 and I just want to run by you all my evidence. I think I have enough but let me know your thoughts..thanks for some feedback!!!
also, did people give one check for 625 or two seperate checks, one for filing and one fore biometrics

check for 625
Copy of the passport and green card Copy of our joint tax return for 2005 and 2006
Copy of tax transcripts for 2005 and 2006
Bank Statements of our Joint savings account from Bank of America
Proof of my husband as the beneficiary for my life insurance policy.
Copies of our Liberty Mutual car insurance notices with both of our names as drivers under the same plan.
Copies of two leases showing joint residence at two apartments (one in 2006, one in 2007).
Copy of three Comcast cable bill with both of our names.
Copy of a PG &E Electric Bill in both of our names.
Copy of our Costco cards on a joint account.
A copy of three airline reservations for a vacations to New Jersey, Honduras and Arizona.
Pictures showing trips we have taken together over past two years.
Letter from my employer stating Dental insurance under same plan.
Copy of Dental Statement with both of our names
Copy of 3 Sprint cell phone bills stating us on the same family plan.
Copies of Cards and various mail others showing same place of residence.
Six original letters written and notarized by U.S. citizen friends, attesting to our relationship and marriage.

The total fee is $545.00.

From page 3 of the I-751 instructions form:

"The filing fee for a Form is $465.00.

An additional biometric fee of $80.00 is required when filing this Form I-751. After you submit Form I-751, USCIS will notify you about when and where to go for biometric services. You may submit one check or money order for both the application and biometric fees, for a total of $545.00."

You have more than enough evidence.

Good luck for a speedy approval.