Brakes...
There is one thing I can add about coaster brakes. I have posted this before, but can't find it right now to direct you to it:
"...(I am giggling as I type this, but take it seriously) I rode a coaster brake bike for many years. One thing I can tell you for sure is that, no matter how fast you are going, if you stomp on it, the thing will lock-up your rear wheel in a "heartbeat". If you are ready for the consequences, go for it...if not, stay away. [While we were flying down a steep hill to Lake Michigan, next to a deep ravine, for some odd reason my buddy locked up his coaster brake on his big, old vintage 50's Schwinn with a front friction motor. It was new at the time.] I can still see poor Jerry Kingston going "airborne into the woods and down the ravine crashing thru the bushes and bouncing off of trees"...and that was a long, long time ago. <roflmao>
Thank the Lord that he only ended up with scrapes and bruises...but his MB crashed and burned at the bottom of the ravine in a twisted hunk of metal, that could have been Jerry.
I think that is all I have to say on the subject of coaster brakes.