I have a 110. It is a tall tank and ok for a fish only. I hated it as my reef tank because of the hight. And, because it's so tall, it's only 4" long. The 125 would be a better tank for both reef and fish only. Lots of swimming space and not so tall so your lights penetrate. Hope I made sense.
my 110 is now fw
with angelfish and discus. It's great for that.