I thank you for your expertise, and I've visited one of the two bike shops today.

Low end: I'll have to stay low end. That's the reality. I'll have to deal with those limitations. Also, I'm not a bike connoisseur. I'll buy the best I can from one of two local shops, learning as much as I can, and letting it go at that. At least I know not to buy at a big box store. Perhaps in my next incarnation I'll get an earlier start...

feet on the ground and leg extension: I don't literally have both feet flat on the ground, but I do make sure my toes touch the ground when seated. With my age and flexibility limitations, it's what I have to do. As strength and flexibility continue to improve, I'll raise the saddle to have better leg extension. So far, my knees have not complained.

I sat on a Specialized Expedition Sport with a small frame, and it works quite well. The crank is not quite as forward as that of a Townie.

weight: the Townie has a steel frame, the Specialized has an aluminum frame, thus is lighter. You're right, it won't make much difference with the kind of riding I do, but any little thing at all that keeps me riding longer into the day and longer into the years is really important. As it is, I'm pushing the limits, trying to be a kid again.

Next up is visiting the other bike store and actually taking both bikes out for a spin.

Your input is much appreciated. Even if I don't take your suggestions in all things, the fact that you voice them has helped me see and evaluate the variables in this decision.