I've been through a similar scenario, although the budget was spread over a couple of months...I ended up being able to get both a flash and a macro lens for a little over $500.


A better flash will make a world of difference once you learn how to use it. Heck, I still haven't really learned to use mine and my results are already a lot better. But I'm not convinced you need a 580EX II...first of all, the 430EX II does support E-TTL metering, which allows the camera to control the flash output. Second, if you get a 430EX II now, you can get a 580EX II later and have the 580EX II fire the 430EX II remotely once you have both. Finally, there are used 580EX Is out there for about the same price as the 430EX II...it's not quite the best of both worlds, but it's pretty nice.


Second, have you considered the EF-S 60mm macro? I just got one of these yesterday...it's crazy sharp, and 60mm is plenty long for flowers. If you're upgrading to full-frame soon, forget it, but it's another less expensive option...