The monitor is the same version as the Hanns-G and Hannspree 28" versions. They are good for gaming and good for being a TN panel, from what I've read.
However - TN panel = gaming. TN panel does not equal colour-accuracy (6-bit vs 8-bit colour). However, don't let this dissuade you, I owned an Acer 22" and it was nice; just not accurate. Thinking about nabbing one of the 28" for LANs, too, but it would be in some time - money's tight, as with everybody else.
As for the Hakkentosh, you need to do your research. Unless you have a system that will boot from a vanilla OSX install, you will more-than-likely have to torrent a particular version (iPC and iDeneb, for example); weather or not you buy the OSX license up to you - just remember piracy is bad.
Personally going to head for an install on a Precision M4400 - mainly as an aid in render times for my G5.