Athlon A64 3200+ would be much faster for games. A64 3000+ would be cheaper and still faster, though not as much as the 3200+.
Intel board usually means no firewire, but probably doesn't matter unless you have a camcorder. I'm happy with the Asus P4C800E I've had since December for my P4 3.2C
Antec Sonata is a good case and PS, especially compared to separates.