Rhoddie, unless you are far richer than most of us, I say keep your pooning "in country." The SPs I've talked to say girls make an absolute killing in Las Vegas, ergo the guys who poon there must be the prey. Because of all the excess money in Vegas, and it's proximity to the rich celebrities in California, the prices are through the roof.
A quick Internet search yielded the following girl:
http://www.classyginger.com/rates.htm
IMHO, there's a lot of girls in Edmonton (and Vancouver I'm sure) as pretty or prettier than her, and you can get FS for $200+ here. Classy Ginger is charging roughly $750 Cdn. Maybe you should consider flying some local talent down to Vegas with you, if she'll accept the Canadian rate. Depending on how many sessions you go for, it might even be cheaper.
If all the above hasn't changed your mind, try this web site:
http://theeroticreview.com/reviews/weblist.asp?svcEscort=1&City=11&AreaCode=&SortBy=3&sumbit=Search
Have fun.
