Our flight Toronto-Ottawa was on what seemed like a very new Q400. Really nice and bright on the inside. You need to watch your head when getting on the plane but there was enough headroom one on for my DH (6'2") to walk down the aisle. We were seated right behind the prop and I didn't notice it being any noisier than most other planes. Legroom was more than adequate for DH also.
Bonus we had on our flight was complimentary beer or wine.