Costume Quest is excellent, but I presume everyone's already got Monkey Island 2 on PC. And if you haven't, well, I can't really recommend buying it as it'll mean giving money to LucasArts, and they really hate it when people do that.
Source: Xbox Live
MKZY
Ouch bitter?
Still I'm on your side! We should march in to the LEC HQ and declare that their sad devotion to that ancient brand has not helped them conjure up a proper business strategy. Now WE are the masters!