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Not sure about the budget but I would get the 350D or 30D camera not the 5d as it has less resolution if you are cropping pics.
Lenses either the canon 100mm or sigma 105mm longer lenses may give you more focus distance but they lose out on weight, portability and ease of flash lighting.
I would get a set of extension tubes - either Kenko or Jessops.
You will also need a flash bracket, off camera flash cord and a decent ETTL flash gun- canon 430EX is good. either buy or make a diffuser.

You can see info on my camera setups here
http://www.flickr.com/groups/mimicry/discuss/66514/
and my photo gallery here
http://www.flickr.com/photos/lordv
Brian V.