If you had an unlimited amount of money...

[Myka]

I would get a 300g (10'x2'x2'). I don't want anything bigger than that. I've just always wanted a 10' tank, and not wanting to waste electricity on lighting I would make sure I had perfect 2'x2'x2' cubes for my MHs. I would also have several 20g tanks plumbed into a single sump and have some really cool invert and Acan tanks.