The problem with those high end gaming PCs... 15 years ago... and today.. is they don't optimize the games for the most expensive hardware. Get the benchmark and you're set. I rocked that stupid GeForce 200mx or whatever for YEARS. But, hey, if you want to make love to one particular game and spend $600 making it look slightly better... it's your money.
$800 for a 27" monitor is far too much money for something that's too small for multiple players. I don't imagine that's much of an issue for the buyers, though.