There's basically a different monitor on every machine. Just make sure you get a CRT widescreen, not LCD or plasma or anything. I'd go with 32" above 40", because honestly the smaller ones are easier to read. On the really big ones I find myself using 350-400 Sudden+ and low Hi-Speed settings.
I'm about 5'10" and 130 lbs. (small) and I agree with everyone saying the machines are too small. I found myself rubbing elbows with people quite often when I played against someone. |