what are next Dallas/TX and Austin/TX cities ?

hi there , I am researching next next best cities  that might boom , like example: Dallas TX/Austin TX, to buy land around , rental properties etc , identify next growing cities in the next 5-10 yrs or so,  please include possible reasons on why these cities might boom .This research should be ongoing on this thread for the next 6 months or so, so we can weed out noise and get to facts.Hope enough people will participate.

Thanks.