Need help buying laptop

Duck'n'Cover

Hi guys, i could really do with some tech-savvy help buying myself a new laptop. Have to admit I'm a little behind when it comes to hardware lately so some insight would be greatly appreciated. Right, straight onto business then, I've got at tops £800 to spend, looking for a multimedia machine that can game at least reasonably well.

So far Ive been looking at Dell, HP, Asus, Acer, Sony and Toshy.

Here are the ones ive been specifically looking at so far.

Dell ~ £790 (inc. discount voucher)

http://www.dell.com/uk/p/xps-l502x/pd?oc=n00x5m06&model_id=xps-l502x
Win 7 Home Premium, 64bit,
2nd generation Intel® Core™ i7-2630QM processor 2.00 GHz
15.6 HD WLED TL (1366x768) 720p with 2.0 Mega Pixel Integrated Camera
6144MB 1333MHz Dual Channel DDR3 SDRAM [1x4096 + 1x2048]
8x DVD+/-RW, & Blu-ray Disc™ combo drive (reads Blu-ray Disc™ & writes to CD/DVD
640GB (7,200rpm) Serial ATA Hard Drive
2GB NVIDIA® GeForce® GT 540M Graphics Card
Intel® Centrino® Wireless-N 1030 (1x2 b/g/n+ Bluetooth Combo Card)

HP ~ 749

http://h40059.www4.hp.com/uk/homelaptops/product.php?id=XE040EA&experience=direct
Win 7 Home Premium, 64bit,
Intel® Core™ i7-720QM Processor 1.6 GHz, Level 3 cache 6 MB
39.6 cm (15.6") diagonal High-Definition LED HP BrightView Display (1366x768)
4 GB DDR3 (1 x 4096 MB)
500 GB SATA Hard Disk Drive 7200 rpm
1GB ATI Mobility Radeon™ HD 5650 Graphics,
Wifi & Bluetooth

Tosh £730

http://uk.computers.toshiba-europe.com/innovation/product/Satellite-A660-1H7/1102325/toshibaShop/true/
Windows® 7 Home Premium 64-bit (pre-installed, Toshiba-HDD recovery)
-Intel® Core™ i5-480M Processor 2.66 / 2.93 Turbo GHz
Blu-ray Disc™ Drive (BD-ROM)
4096 MB (2048 +2048) DDR3 RAM (1066MHZ)
39.6cm (15.6") TruBrite® HD (1366 x 768) High Brightness display with LED backlight
512MB NVIDIA® GeForce® G 310M
Wifi & Bluetooth

Sony £799

https://shop.sony.co.uk/shop/ipc/displayLayout/%28cScrollCharGroupName=%24BASE_GROUP&citemarea=4BBCA70C2677011AE10080002BC29BE2&cInstId=1&layout=25_173_74_75_77_78_79_80_82_91_92_141&cCharName=C1000000009_F13&next=config&carea=%24ROOT&order=&citem=4BBCA70C2677011AE10080002BC29BE24C801D38C3B100B2E10080002BC29B72&xcm=PCM_b2ccrmstandard&Z_OMNI_CSINT=14000017&cCharGroupName=%24BASE_GROUP&isHideActive=%29/.do
Genuine Windows® 7 Home Premium
Intel® CoreTM i5-480M, 2.66GHz
500 GB Serial ATA (7200 rpm)
4 GB 1066MHz DDR3-SDRAM
DVD disc drive
41.6 cm LCD, 1600x900 + webcam
NVIDIA® GeForce® GT 425M 1GB
Wifi & Bluetooth

Asus ~ £764.94

http://www.asuslaptop.co.uk/proddetail.php?prod=B53J-SO085X
OS: 64 bit Windows 7 Professional
Display: 15.6" HD TFT (1366x768, Color-Shine)
CPU: Intel® Core™ i5-460M (2.53GHz)
Graphics: ATI Mobility™ Radeon® HD 5470
Storage: 500GB (5400rpm)
Memory: 4096MB (2048x2)

Acer ~ Out of my price range for decent spec.

I'd love some feedback on the above and if you guys have some other recommendations, fire away.