2 systems 1 AMD 1 Intel help me choose

yer building a new system and being from England i have did research from local stores and this is what I've come up with for prices.

system 1

CPU: AMD PHENOM II X4 940 (3.0GHz) 8MB CACHE
RAM: 4GB DDR2 RAM 1066MHz
MB: ASUS® M3A79-T DELUXE: AM2+
HDD: 500GB SERIAL ATA II HARD DRIVE
CD/DVD: 6x BLU-RAY ROM & HD-DVD ROM DRIVE, 16x DVD ±R/±RW
GPU: 2048MB RADEON HD 4870X2
Case: Antec Nine Hundred Black Gaming Case
PSU: 700W Quiet Quad Rail PSU + 120mm Case Fan
Cooler: SUPER QUIET 22dBA TRIPLE COPPER HEATPIPE CPU COOLER
Moniter: 24 Inch Wide TFT Silver/Black 1920 x1200 8MS
=£1484

system 2

CPU: Intel Core i7 Processor i7-920
RAM: 3GB CORSAIR XMS3 1333MHz
MB: ASUS® P6T: DDR3
HDD: 250GB SERIAL ATA II HARD DRIVE WITH 8MB CACHE
CD/DVD: 22x DUAL LAYER LIGHTSCRIBE DVD WRITER ±R/±RW/RAM
GPU: 2048MB RADEON HD 4870X2
Case: Antec Nine Hundred Black Gaming Case
PSU: 700W Quiet Quad Rail PSU + 120mm Case Fan
Cooler: N/A
Moniter: 24 Inch Wide TFT Silver/Black 1920 x1200 8MS
=£1496


For system 2 i will upgrade with more RAM and cooler



Both will have Vista 64 bit on them. it will be primarily used for gaming but might use windowed gaming from time to time whilst using messenger and internet
Please tell me witch one you would go for and what problems there are with them because this is first time with my own custom PC

and don't argue about price to me because these are the figures I've got from local shops in Cumbria (we love are male Cells) with the ripoffness prices