Yeah, skip a 55g if you can, in any way. I liked my 55g at first, since it's the biggest tank I've owned (aside from ponds and giant plywood tanks), but I'm starting to despise it. I see all these fish that I could keep happily if the tank was just a littttllle bit wider. 13.5'' wide won't get you much. The only exception is a "55 long".. I've never heard of them before a couple days ago. My LFS had one, and I forgot the exact measurements, but it's noticeablly shorter (height) and much wider, at about the same price. Soon, when this 55g is empty, it's getting turned into a planted wild Altum Angel tank, I think. Or some dwarf species like Blue Rams and Dwarf Acaras. Personally, after close and hard examination, 55gs aren't really good for much in the way of any fish over 10'', which is a serious bummer. They're pretty great for plants, though, I've found.