75 gal or 125 gal?

Alright guys and gals. I'm getting my house either the end of this week or the beginning of next week(hooray!):dance:. I'm going to get a bigger tank right off the bat for sure. Later upgrading to a 180 or 220 (depending on moolah at the time). I can buy a 75 brand new with a corner overflow for 199+tax. I can buy a 125 used, with overflow, sump and pump for 200, but I have to drive 180 miles one way and I don't know how old the tank is. I'm tossed on the idea. I know you can reseal tanks but I don't want to fool with that. I'd mess something up and come home to a flood, dead fish and dead coral. I have several different tanks I can turn into sumps so that's no problem. I'm just thinking should I take the chance, or just go with smaller new. 75's are nice but 125's can fit more stuff, which I like. I have a cinnamon clown(or fire, not positive on which one), blue damsel, and six line wrasse. What else could I put in there with them in a 75? The reason I'm waiting on the gigantic tank is because I'm going to see the price difference from my 30 to the 75 or 125 and see if I can afford the maintenance, electric jump, and all the others along with a new house and new born baby in June. That tank may be there for 6 months before I upgrade or 2 years. Maybe even for good. Anyone with a 75 let me know how you like them and stock. Any suggestions will be helpful and appreciated. Thanks in advanced!