This one:
http://www.scan.co.uk/Products/4GB-(2x2GB)-Corsair-Dominator-DDR2-PC2-8500-(1066)-240-Pin-Non-ECC-Unbuff-CAS-5-EPP-DHX-plus-Fan
Or:
http://www.scan.co.uk/Products/4GB-(2x2GB)-Corsair-TwinX-DDR2-Dominator-GT-PC2-8500(1066)-240-Pin-Non-ECC-Unbuffered-CAS-5-plus-DF
Worth the extra £9?
http://www.scan.co.uk/Products/4GB-(2x2GB)-Corsair-Dominator-DDR2-PC2-8500-(1066)-240-Pin-Non-ECC-Unbuff-CAS-5-EPP-DHX-plus-Fan
Or:
http://www.scan.co.uk/Products/4GB-(2x2GB)-Corsair-TwinX-DDR2-Dominator-GT-PC2-8500(1066)-240-Pin-Non-ECC-Unbuffered-CAS-5-plus-DF
Worth the extra £9?
I'd type my pc specs out all fancy again but teh mods would remove it. Again.