confused

[murm]

building a new rig would like to know which gpu to buy and also if a 550w pcu will be ok

http://www.overclockers.co.uk/showproduct.php?prodid=GX-126-MS
or
http://www.overclockers.co.uk/showproduct.php?prodid=GX-266-AS

any help would be much appreciated

 

[murm]

thankyou for replys though im still not sure. this is my preposed build.

Your basket
Product Name Qty Price Line Total
Intel Core i5-2500K 3.30GHz (Sandybridge) Socket LGA1155 Processor - Retail £161.99
(£134.99) £161.99
(£134.99)
Gigabyte Z68AP-D3 Intel Z68 (Socket 1155) DDR3 Motherboard £85.98
(£71.65) £85.98
(£71.65)
Microsoft Windows 7 Bundle - Home Premium 64 Bit £68.40
(£57.00) £68.40
(£57.00)
Options applied to the above product:
Western Digital Caviar Blue 500GB SATA 6Gb/s 16MB Cache - OEM (WD5000AAKX) £30.98
(£25.82) £30.98
(£25.82)
Zalman Z9 Plus Tower Case with Fan Controller - Black £49.99
(£41.66) £49.99
(£41.66)
OCZ ZS Series 550W '80 Plus Bronze' Power Supply £47.99
(£39.99) £47.99
(£39.99)
Kingston HyperX Blu 4GB (2x2GB) DDR3 PC3-12800C9 1600MHz Dual Channel Kit (KHX1600C9AD3B1K2/4G) £23.99
(£19.99) £23.99
(£19.99)
LG GH22NS70 22x DVD±RW SATA ReWriter (Black) - OEM £17.99
(£14.99) £17.99
(£14.99)
Sub Total : £406.09
Shipping cost assumes delivery to UK Mainland with:
DPD Next Day Parcel
(This can be changed during checkout) Shipping : £20.10
VAT is being charged at 20.00% VAT : £85.24
Total : £511.43

though i probably will go for the cheaper card. i think lol not sure.
can you recommend a gpu for around £150?