You're going to spend most of your time sitting down in front of your tank staring into it. Most new stands are 28". I thought 28" was too low. I thought I wanted a 32" high stand. Then, I took the foot stool that I planned on using to observe my tank, sat on it, and realized that, at 32" I would be looking up a lot. I realized that 28" was actually perfect for me (and I'm 6'2").
Take whatever you are going to sit on to view your tank, sit on it, and take some measurements. You can buy a cheap step stool to be able to reach into your tank; but, you're going to spend most of your time just looking at it. Pick a stand that gives you the best viewing height.