Good but expensive
The Phoenix area has some hot young escorts, but unfortunately the average hourly rate there is $400 US, so you won't be finding many bargains. On the other hand, you can get GFE/PSE service for those rates.
I had one of my best sessions ever with Isabella Amore, who unfortunately is no longer available to new clients. She occasionally does duos with Mya, who is generally considered Phoenix's #1 escort.
http://www.ohmya.net/
For an overview of the available talent see
http://www.phoenix411.net/escorts/escorts.htm Click on the escort you're interested in seeing and you will get her profile and a link to her website.
Bottom line: very expensive but top-notch service as long as you do your research carefully. The TER Phoenix board is also filled with good information as, of course, is the TER Phoenix review section.
Good luck. You can't beat the weather for golf in the winter!!