I would choose Phoenix over Las Vegas because I had lived in sin city on and off for 8 years. I also used to live in Tucson for 1.5 years. I was not happy being in sin city for several reasons. Some Deaf LV people are the embarrassment to me. I don't want to do anything with them...they are plain stupid.
Phoenix has tons of offers for Deafies... jobs, technologies, Deaf events, etc.. LV? well, not much except casinos and 24/7 being sinners. I suggest that LV is good for tourists, not permanent residents. However, it is up to you anyway.
I left LV for East Coast for good since 2005 and would not look back ever since. I'd rather to live in East Coast than West Coast. I go to LV for visiting my parents..that's it.