I'm thinking of buying a bicycle and need suggestions on where to look and what to buy. This will be to ride around the neighborhood or up town, for a little exercise. Probably only a few miles a day, but I don"t want to have to work on it all of the time. I'm thinking Mountain bike style, something tough and durable. Cost is not really an issue, but I know that I don"t need or want a $5000 competition bike. Mostly something a little better than the China/Walmart line. So, what brands and stores should I check out? Thanks, Lightman