Denise, you might consider the Canon 100mm f/2.8 non-L macro - IQ is similar to the L, just lacks IS and weather sealing.

FWIW, there's one on my local CL for $375.

http://boston.craigslist.org/gbs/pho/2986426305.html

Seller's location is convenient for me - if you're interested, PM me - I can test it, buy it and send it to you.