Don't everyone go ripping on the barton now. That is one solid processor but the vid card is lacking. I have a XP 3200+ setup with a 6800GT and I can play any game out right now at good resolution with med to high details. I played FEAR at a paultry 1024x768 max details but BF 2 is at 1680x1050, AOE 3 is the same, and I will be doing some in depth benchmarking tonight with COD 2.
Your setup is defintly pretty and defintly a budget build (though I would have rather gotten those common A64 3400+ skt 754 and mobo combos for $200) but it looks ok. You could have done better for the money but it will serve well as a gamer if/when you upgrade that pos graphics card.
-spike
Here is an example: You could have gotten
this combo (Gigabyte + Skt 754 3400+) and still used an AGP graphics card. Or you could have gone with a 939 venice 300+ for $130 with a Asrock dual board for $68. That would have given you the agp slot as well as a PCIe slot for later, and all for under $200.