this is a build that i'm hoping to build.. there are bundle deals using some of these components so it would help me financially. but here is a link to the build
Storage:Sandisk 128GB 2.5" Solid State Disk ($92.98 @ OutletPC)
it would be best if you ignored a ssd for your budget and upgraded your cpu, mobo, ram and gpu instead.
Case:NZXT Source 220 ATX Mid Tower Case ($44.99 @ TigerDirect)
you have a micro atx motherboard. you can go with a cougar spike matx case for $25. great case for the size and money.