I've never kept mine in water higher than 78 degrees and that wasn't for very long at that so I couldn't tell you for sure. Having said that, I would think if you provide a decent flow with good oxygen levels, you could likely acclimate them to the 80 degree range. They are a pretty hardy fish that's easy to care for. The nice thing is that they will spend time at all levels of your tank.
I plan on putting a couple of my juvies in my 75G tall that is kept at about 79-80 degrees and see how they do. I'll let you know if they like it or not.