I didn't notice the RAM slots, sorry. Yes, the mobo was good in that combo, but not the case/PSU. Try this one:
ECS IC780M-A AM3/AM2+/AM2 AMD 770 ATX AMD Motherboard - Retail
Kingston HyperX 1GB 240-Pin DDR2 SDRAM DDR2 800 (PC2 6400) Desktop Memory Model KHX6400D2/1G - Retail
$84 w/free shipping on the RAM and $16 MIR on the mobo.
The Athlon II 240 is the latest generation, while the 6000+ is a couple of generations old. The 6000+ may be 3.0GHz, but the 240 gets loads more done on 2.8GHz because of how it is made. think of it as a 4-banger and a V8... at 2500RPMs the V8 is putting out a lot more power than the 4-cylinder is putting out.
Ultra is not known for good power supplies. Rosewill's PSUs are decent if not good. There are much better out there, but on this thin of a budget you have to use what you can. If you can find a good sale on Antec, FSP Group, BFG, OCZ, Corsair, PC Power and Cooling, or SeaSonic (all good brands off the top of my head), go for it. We have a PSU guide posted around here somewhere...
Don't worry about being new and not knowing this stuff. We all started there at one time or another.