You can get Weinmann rims and Formula hubs for similar prices. Example:
http://cgi.ebay.com/WHITE-WEINMANN-DP18-FORMULA-TRACK-FIXED-WHEELSET-MSW_W0QQitemZ350104139565QQcmdZViewItem?hash=item350104139565&_trkparms=72%3A1205|39%3A1|66%3A2|65%3 A12|240%3A1318&_trksid=p3286.c0.m14

I can't say that they are better than the Vuelta's, but Weinmann is at least a name brand. They don't mention who makes the rims in your wheelset. You'd have to add the cog and lockring to the $159 price. This is essentially what I bought for my son's fixie. Oh yeah, and the hub is f/f which may interest you - possibly more versatile, depending on what you're looking for.