I did a search just last week and found a magazine article (I can't remember the year and in fact I'm not sure I even noticed that!) that reviewed many different software programs, both PC and Mac. There was even an accompanying chart that listed all the different attributes of the various programs.
I am not at that computer, and am not even sure I saved anything from the search in any case. But I will look in a bit and post back if I find the article and a link. It was pretty comprehensive.
I don't have Virtual PC so you have options I do not. You're in better shape, inf act, b/c I think in any case, most of the features tended to be on teh PC side of the aisle.
You might want to check version tracker and MacUpdate, too, because I know there are at least a couple programs people have talked about. One was just updated last week, I believe.