i have an old system it's a iqon LITT01 the mobo is ms-7071 it has a pentium 4 3.4ghz processor, 2gb of ram, agp 8x ,350 watt psu and at the moment i have a radeon 9550 graphics card but i want to upgrade it. So what would be the best graphics card i could get for my system. thanks for any reply's.