After one too many expensive car repairs, I've decided to re-enter the two-wheeled world (with my bus pass handy for long or impractical trips). I am looking for an inexpensive cruiser for use on mostly flat paved roads. I haven't been on a bike since I was a kid, and I'm well, not a kid anymore. I'm not obese but I'm not athletic either. I was looking at single-speed cruisers with coaster brakes because they're so mechanically simple and thus easy to maintain. But I wonder if I'd be better off with at least 6 or 7 speeds since I'm a middle-aged couch potato. I like the idea of front and rear brakes too.... Given that information, which do you think would be a better choice for me?