Dont forget the big thing everyone seems to forget with a Turbo is you will need a new back tyre (pref - Turbo specific) as the heat generated on the tyres is a lot greater than road riding and it can end with warped tyres and worse mid ride they can de-laminate which isnt good. If your going for a Turbo get a
ebay back wheel and put the tyre on that then when you want to use it you can just swap the wheel over....
Personally id go for a set of Rollers, yea they take a while to get used too but once you do there brilliant bits of kit