Not too clued up on cameras, but i would look for somthing 5mega-pix or more, and obviosly with the macro as a selling point.

Best bet is to go go to a camera forum/review site to find one thats cheap and does good macro's

I do this for all electronics, if im looking for a TV, ill go to a tv forum and see what the falva of the month is, it will be full of people with expert advice for all budgets.

just put a post up saying my budget is xxxx and it needs to be a good all rounder with emphasis on good macro, sit back and wait for the resident know-all's to reccomend somthing.