Well, thanks for all the suggestions. We did quite the bike road trip today. Dad tried out some of the pricier bikes (Commuter) and some of the cheaper ones (Raleigh which was waaaaaay overpriced for what it was) and he found he liked the trek 7000 best. So, he ended up on the low end of his price ranger with a nice bike at my favorite shop. It was on sale, too. We switched out the stock saddle for something a little wider in the sit bones and put on a kickstand. They fit him and he got the 15. One shop told us he could probably do a 17 - hah! So, I was glad for him and he seems very happy.