Wow, thanks for the quick reply guys!
I'm reading this off the PSU box, but basically, it says:
Ace ATX12V P4 Switching power Supply
AC Input: 230VAC 10A 50-60Hz, Model: A-700BR
And then a bunch of max DC output conversion charts
What shall I look out for when upgrading the GPU and the CPU Coolers? For example, any particular brands, inputs, sizes, power, etc.? I wouldn't want to go out and buy some beastly card just to have bought the wrong brand or something. That'd be more noobie than Halo's AI.