Provo, Utah!
Brigham Young University has one of the largest enclosed arenas in the world (The Marriott Center), we've got lots of hotels (for all them college families), lots of parking, a 20 lane bowling alley in the student center, all the important stuff!
It'd be a nice in-between location for the teams out west that think Denver is a bit too far, and the teams out east that think Vegas is too much temptation.
Either that or Salt Lake City's Delta Center or something.
[edit] I think pakrat's on to something....

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Dave