Thanks everyone for the feed back so far.
Don't have room for 6 foot tank, I would love to go that size, just don't have the room, very very limited on space.
The 5 foot tank would fit perfect, but never thought about the light, that going to be a pain, or expensive.
Also like the 48x24x24, but the tank would then stick out over the window, which won't be good and don't think wife would like for window to be blocked.
It all goes back to space, and we are very limited.