Leg length wise I can get (at a push) both feet down (toes only) or with a shuffle, one foot flat on the ground. Usually though I just settle for one set of toes!

Excessive noise is not something I have come across, maybe at 5 10 I am just the right size for the screen?

Helmets will make a huge difference to the amount of noise you have to deal with regardless of what bike you ride, if you don't already I would also recommend you use earplugs, that makes a huge difference.