To anyone still considering a laptop based around an A8-4500M, I can confirm that this CPU is fine for older titles.
For example:-
Half-Life 2 - runs at 40+ FPS on high settings at 1920x1080
Crysis - runs at 25+ FPS on Medium settings at 1280x720
Crysis 2 - runs at 25+ FPS on 'High' (i.e...