Tilt doors are quiet akward to open and close in my opinion. You can't park close to the door because you have to allow half a meter clearance as the door swings out when being opened or closed.

Roller doors are quiet OLD now - sectional doors are the new trend.

Definatelly stay away from Modern - BIG rippof artists!

Olite: that would suck. My door for example (the motor actually) is fitted with a safety device which stops the door and retracts it back if it comes accross an obstacle - you can park your car under it, it will touch the car, push a little and then lift back up.