I would second, third, and fourth the nomination of Dallas. I've been there once and screwed the pooch by deciding to visit an AMP instead of treating myself to one of the dozens or so ladies of DFW that I would so love to meet. Dallas seems to have the volume and diversity of providers. You could literally have a different flavor every day and at reasonable rates. Although, if I lived in Dallas, I'd have to be Jerry Jones; otherwise, I'd go broke
As honorable mention, any city in Texas seems to be a good hobby market-- Austin, San Antonio and Houston all seem to have the same good thing going on is in Dallas, but with Dallas, it is like fun on steroids.