Rob,
There's a number of guys here that have around the ceiling "layouts", search in the "Track Plans and Layout Design" section or in the "Photo Albums" section.
I would think you'd want bullet-proof track. All the big guys (Atlas, MTH, Lionel, Gargraves, Ross Custom Switches) make nice track. IMO, Ross makes the best switches, but if you aren't going to use any then...
Do you want track with roadbed already on it or do you plan on laying the track on roadbed at all? I used strips from a anti-fatigue mat I bought on a roll at Lowes a few years back, makes things nice and quiet (if you add ballast it makes the noise louder).