New PC to run AA2, Looking for suggestions Options

[Linker Split]

Hi guys,
seems that... well, I'm going to be back... lol... in some months..

I'm building my new PC with some new stuff like Motherboard, GPU...
Since I would like to start again editing for these games, I'm looking for the best-at-good-price computer

I already have:

Motherboard AsRock 4CoreDual-SATA2
CPU Intel Core2 Quad Q6600 @ 2.40Ghz
Cores pr CPU 4
Measured speed 2394.9 GHZ
Multiplier 9.0X
Bus Speed 264Mhz
Front Side Bus speed 1055Mhz
L1 Instruction cache 4x32 MB
L1 data cache 4x32 MB
L2 cache size 2x4 MB

RAM 2048MB

Ok so.....
I'm about to upgrade this.
I would like to buy a new GPU and I'm a bit confused between some Nvidia GPUs and some ATI ones.
Models are:

Nvidia GTX 460 1GB GDDR5

CUDA Cores 336
Graphics Clock (MHz) 675 MHz
Processor Clock (MHz) 1350 MHz
Texture Fill Rate (billion/sec) 37.8
Memory Clock (MHz) 1800
Standard Memory Config 1GB GDDR5
Memory Interface Width 256-bit
Memory Bandwidth (GB/sec) 115.2

PRIZE: 210€

Nvidia GTS 450 1GB GDDR5
Processor Cores 192
Graphics Clock (MHz) 783 (MHz)
Processor Clock (MHz) 1566 (MHz)
Texture Fill Rate (billion/sec) 25.1
Memory Clock (MHz) 1804
Standard Memory Config 1GB GDDR5
Memory Interface Width 128-bit
Memory Bandwidth (GB/sec) 57.7

PRIZE: 170€

Ati Radeon HD5770 1GB DDR5
# Engine clock speed: 850 MHz
# Processing power (single precision): 1.36 TeraFLOPS
# Polygon throughput: 850M polygons/sec
# Data fetch rate (32-bit): 136 billion fetches/sec
# Texel fill rate (bilinear filtered): 34 Gigatexels/sec
# Pixel fill rate: 13.6 Gigapixels/sec
# Anti-aliased pixel fill rate: 54.4 Gigasamples/sec
# Memory clock speed: 1.2 GHz
# Memory data rate: 4.8 Gbps
# Memory bandwidth: 76.8 GB/sec
# Maximum board power: 108 Watts

PRIZE: 180€

Ati Radeon HD5750 1GB DDR5
# Engine clock speed: 700 MHz
# Processing power (single precision): 1.008 TeraFLOPS
# Polygon throughput: 700M polygons/sec
# Data fetch rate (32-bit): 100.8 billion fetches/sec
# Texel fill rate (bilinear filtered): 25.2 Gigatexels/sec
# Pixel fill rate: 11.2 Gigapixels/sec
# Anti-aliased pixel fill rate: 44.8 Gigasamples/sec
# Memory clock speed: 1.15 GHz
# Memory data rate: 4.6 Gbps
# Memory bandwidth: 73.6 GB/sec
# Maximum board power: 86 Watts

PRIZE: 160€

Also I would like to upgrade my Windows XP and buy Windows 7 64-bit.

So guys, what y'a think?

Tell me everything you know

This post has been edited by Linker Split: Oct 8 2010, 16:52