Austin is strong, but from what I've seen the bubble will not pop soon (units being built vs net increase in population). I partnered on a small 16-unit we purchased in November 2015 in North Central Austin just north of 183. I have two buddies who each just bought or are buying 100+ units in the North / North East Austin. Lots of things in Austin have been getting expensive, so some have sold properties they bought around 2012-2013 for a tidy profit.
We also partnered on a 50 unit in South San Antonio in December 2015 that was an off-market deal. I am a partner in two other deals in that same area. I know others buying in San Antonio as well.
The I-35 corridor between San Antonio and Austin seems popular. I know someone who just bought a class A in New Braunfels. I'm also aware of several purchases in Corpus Christi in the last 12 months of which I have participated in 3.
There is even some non-student housing in Bryan/College station, but I have not participated in the 3 purchases I know of there. I'm seeing some interest in Waco, but I don't have any details.