Here's my 2 cents regarding shopping for a lender to consolidation your student loans with.
Basically, the rates are fixed. No matter which lender you go with, you'll get the same rates.
What you need to look at are the extra rate reductions, if any. These usually include 0.25% reduction if you let them deduct the monthly payment directly from your bank account, and 0.75% to 1% reduction after paying on time for a number of months (vary from lender to lender from 6 months to 48 months).
The best plans I've come across so far are:
http://www.studentloan.org (0.25% rate reduction for direct payment + 0.75% rate reduction after 6 months of on-time payment.)
Suntrust (0.25% rate reduction for direct payment + 1% rate reduction after 36 months of on-time payment.)
Take a look at the
thread at FW for more info.