I think i've decided on the D3100. It has a lot of the d5000 features, but its on sale right now for only $50 more then the d3000..
Here are some updated tank shots. I got a few unknown zoa frags this weekend along with a Emerald Crab (who I still haven't seen) and a half dead favia frag that i got from a guy a few weeks ago, who had it under MH lighting. It seems to like the PC light. A lot more skeleton was showing when i fist got it, I can even see some green coming back.