For gaming on a 17" does this look ok - would like to give ATI a try, hence the 4830 instead of 9600/9800GT
e5200 £62.08
2GB PC6400 £21.84
Asus G31 £35.08
Antec NSK4480B with 380W PSU £55.99
LG Sata Black £13.79
PowerColor 4830 £89.99
Comes to £278.77
Will the PSU and motherboard be ok? What heatsink is the best balance between cost/performance?