Rage-quitting my bad computer

[Portasaurus]

A lot of the PC games I play suffer from a completely debilitating mouse lag which makes playing them absolutely impossible.

There IS need to be upset, I'm sick of it, and via the power of credit cards, I'm rage-quitting my bad computer.

What should I get?
Desktop? Laptop?
Should I get one of those Alien computers?
Roughly how much money should my credit card company be prepared to spend?

Halp!