Oh sorry, Ben, keep the monitor you have, it'll be fine, I used to play on a 15inch widescreen monitor, max resolution was quite low but the picture was pristine, since it was that monitors max resolution.
If you get a higher resolution monitor and need to run at a lower resolution the picture might not look as good, generally I think you get the best picture at a monitors native resolution, so if you have a monitor with a lower native resolution you'll have a good picture and you'll free up resources in your comp at the same time.
Remember, never give into the ratrace.
