Thanks very much for your comments, Prof.
I do have the option of using a room that is 13' X 40', but would prefer the smaller room because it is near our main living area and keeps me near the action. I would guess that with this size room the 120 is a more viable option?
If I went with the 126 it would likely need to be new. The 120 I might be able to do used.
Thoughts?