New gaming Rig

Hi im buying a prebuilt system but i get to choose some of the specs what do you guys think of this?

PC Case: Coolermaster Elite 330 Case - included in price
Power Supply: Quiet Coolermaster 650 Watt Dual 12V Rail PSU
Processor: Intel Core 2 Duo E8500 CPU - included in price
Heatsink & CPU Fan: Arctic Cooling Freezer 7 Pro CPU Heatsink & Fan
Motherboard: Gigabyte GA-P35-DS3L Motherboard - included in price
DDR2 Memory: 4 x 1GB Kingston 800Mhz PC6400 DDR2 Ram - included in price
PCI-E Graphics: 512MB nVidia 8800 GT nVidia GeForce PCI Express Graphics Card - included in price
PhysX Card: None
Sound Card: Creative Audigy SE 7.1 Sound Card - included in price
Primary Hard Drive: 250GB SATA 7200RPM Hard Drive - included in price
Secondary Hard Drive: None
Main Optical Drive: 20x Dual Layer DVD Rewriter - included in price
Secondary Optical Drive: None
Floppy Drive: None
Memory Card Reader: None
Dial-Up Modem: None
Network Adapter: Integrated 10/100/1000 Network Card - included in price
TV Tuner: None
Firewire: None
TFT Monitor: 20" Samsung (SM-2032BW) Widescreen, Black, LCD, 3000:1, 2ms, 1680x1050, 300 cd/m2, TFT
Keyboard & Mice: Standard Keyboard & Optical Mouse - included in price
Speakers: 2.1 Speaker System - included in price
Printer: None
VOIP Hardware: None
Operating System: Genuine Windows Vista Home Premium - included in price
Antivirus & Security Software: AVG AntiVirus - included in price
Multimedia Software: Ahead Nero Burning Software - included in price
Office Software: OpenOffice - included in price
Warranty: 2 Years Return To Base Warranty (1st Year - Parts & Labour, 2nd Year - Labour Only) - included in price

i have a choice between Choice of Gigabyte GA-P35-DS3L Motherboard OR GigaByte GA-N650SLI-DS which one?

is it future proof?
what do you think of this system?
will it play cod4 with ease? also crysis?

1st £926 inc vat
2nd budget is £950 inc moniter
3rd Gaming
4th Dont want to, no time
5th its from arbico computers, know of them?

is the coolmaster cavalier any good?