Recomend me a home build for development / music / and games mid-spec

hello knowledgeable digital nijas

I want to upgrade from my current PC :

1) AMD 64 x2 +4.2.
2) 2Gb of ram (not sure what kind of)
3) PSU 600w
4) ugly case
5) Nvidia 7800 GS
6) some EDIE drive and
7) M-AUDIO DELTA 66 audio interface

I do play EVE Online and Age of Conan.

should I go with AMD or Intel? We main things I need = stability / no audio lag.

my native resoution 1920x1200.

my budget - $600-1000

the system I've build at newegg.com:


1) Antec Nine Hundred Black Steel ATX Mid Tower Computer Case - Retail $99.99

2) Western Digital VelociRaptor WD1500HLFS 150GB 10000 RPM SATA 3.0Gb/s 3.5" $179.99


3) GIGABYTE GA-MA790XT-UD4P AM3 DDR3 AMD 790X ATX AMD Motherboard - Retail $139.99

4) EVGA 896-P3-1262-AR GeForce GTX 260 Superclocked Edition 896MB 448-bit GDDR3 PCI Express 2.0 x16 HDCP Ready SL $140.00


5) G.SKILL 4GB (2 x 2GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Dual Channel Kit Desktop Memory Model $64.99

6) AMD Phenom II X4 955 Black Edition Deneb 3.2GHz Socket AM3 125W Quad-Core Processor Model HDZ955FBGIBOX - Retail
$245.00

total $919

I am no expert, so I could be wrong.
I would save some money on the HD and spend it on the graphic card. (2x4850/4770 crossfire)