I vote you get as big a tank as you can fit/afford in your house. That sale generally only reaches 55g, so I suggest either a 40b or a 55g. To be honest though, I personally prefer to by tanks used whenever possible because it still ends up being a lot cheaper that way. A stand for a tank that big is not a cheap venture. If you are able to build one, that would work, but if you are like me and have 0 building skills, the prospect of buying a new stand is rather daunting.
Of course, it all depends on what you plan to keep.