I've been talking with a sales person and he's been really helpful. The Diamond ProAm now comes in a 3 piece slate so getting it down stairs will be a whole lot easier. The stairs are pretty wide open with cathedral ceilings so I think we'll be able to get it down there no problem if it's taken...
The basement game room is pretty large (about 900 sq ft) and it will be designed around the table. I measured for a 8' table and it fit fine. If I go with a 9' I'll have to turn it 90deg.
I've plaid my whole life one my parents 7 foot Valley table. I just built a new house and have enough room in the basement for a 9 foot table. When I talk to players about getting a new table most of them are saying that if I want to be a really good player and have the room I should go with a 9...