I finally did it!
#1, The store. I went to 3 other places. The service here was hands down the best.
#2, Decisions, decisions! There were 4 areas packed with stuff ready to roll.
#3&4, My choice. I checked Consumer reports to get some ideas, and then looked at mountain and roadbike review for some real feedback.
I tried runnig last year and tore both calf muscles, made it hard to even walk. If this doesen't work there's still swiming, which I should be doing this winter.
Mark.