Hmm, if you have 3 slots, it may be worth while to invest in just one 1gb stick. Or put 1*1gb with 2*512. Cause with hard core gamers, 2gb is not uncommon. But if you do 3*512mb, well......1.5gb may be on the middle lower end of a high-performace gaming machine.
With 3 slots, does the mobo handle Dual Channel? If it does, then Dual Channel will NOT be supported on 3 slots if you have all three filled. Thus the better way to go would be either get a 4slot mobo so you can fill all four and have dual channel. Or with a 3 slot board, get 2*1gb and leave the 3rd slot empty, so you can have dual channel with 2gb of RAM. That would be optimal I think.
As for the case, I was looking at that one myself, I'm leaning away from fancy do-da so called "gaming" cases with loads of plastic and huge side windows which makes the side panel flimsy. I'd like a simple, elegant case, with solid construction.
But any sub-$100 case is bound to have some flimsy pieces. A $150+ case, perhaps aluminum, would be my next choice.
If you want to see a handfull of awesome cases, minus all the really junky ones Newegg has, check out the offerings at
www.xoxide.com. Tell it to show all cases, and see what they got. Pretty cool stuff there.
have fun!