Without a doubt BenQ has made a monitor that's very interesting for gamers. We would even go as far as saying that the RL2450HT is a better gaming display than the significantly more expensive 120 Hz XL2420T.
Slow computer got you down? Maybe a hardware upgrade should be in your cards, if so this guide to the Fundamentals of Upgrading a PC is an invaluable read. PCSTATS Tips