My Vaio E-Series I bought 2 years ago for £650 has a Radeon 5650 which plays anything you can throw at it (granted on low-med settings), which is a perfect accompaniment to my gaming desktop. I don't quite see where you're coming from when you suggest you can't get anything other than integrated graphics if you want to spend under £800 (you even contradict yourself by saying you can get a GTX 650M for £520 :P).