I have always had glass, but when I got my new 230 I had IAP build it out of 3/4" acrylic, cost just a little more but doens't bow at all. I really liked being able to drill it where needed, and love the coast to coast overflow and the euro bracing. Scratches are something to be careful of, but I seemed to get a few overtime with the glass ones and couldn't do anything about the scratches, which has been very easy to take out with a scratch removal kit on the acrylic. Temp in the tank seems to stay more steady also.