The motherboard is a good choice. The 4000+ is a good processor, too. I personally would go with a 3800+ because it benchmarks very closely to the 4000+, but it costs $215 less on newegg.
If you are looking for one really good vid card, get a 6800GT or 6800U.
Intel E6750...........PSN: ELBATROP
XFX nForce 650i Ultra
Patriot PC2-6400 8GB (4x2GB)
36GB WD Raptor
Samsung SyncMaster 931c
Samsung SyncMaster 750s
Windows 7 Home Premium 64