I would look at Mavic MA 2's, as these were a great cyclocross rim for years and years. Should be able to pick up a rear with a sugino hub for about $80-$100. It would be to your advantage to try to get them hand built, if at all possible, as most wheel builders will include minor adjustments/trues.
I've had no experience with the Miche's so I will reserve an opinion, but Weinman's prove to be a soft material rim. This is good for trueing, but once that rim becomes warped, it's done for.
I believe the Vuelta's are made by the same factory as the Weinman's.
Take a look at Formula hubs as well, they use the same bearing diameter as Phil Wood and are easy to service.
And I find it better to send a little more now on wheels, than have to replace cheap one's several times over. That's just me though.
And being fixed gear, you can take the time to do your own paint on the rims, if that's your kind of things.
http://www.myspace.com/sjroadrashandteasociety"Americans are broad-minded people. They'll accept the fact that a person can be an alcoholic, a dope fiend, a wife beater, and even a newspaperman, but if a man doesn't drive, there is something wrong with him." ~Art Buchwald