Thanks DaveSSS, that was helpful. On my Traveler, I would like to get the handlebars a little higher so that they are closer to the saddle height. Looks like I am going to need a different seat post and stem.

I do not see myself buying anything new at this point. There are plenty of older bikes out there and it gives me a chance to tinker and determine exactly what I would want and need on a new bike when the time comes. I just wanted to make sure I am on the right track with frame sizes so that I can make sure I do not buy something that clearly won't work for me and the range of sizes you listed helps a lot. Thanks.

I was also curious what others prefer to ride when they are in between frame sizes. One size up or down? What is the better tradeoff?

One thing I have learned so far. When adjusting my seat post a few weeks ago I didn't get it tight enough and it slid down about 3/4" while I was riding. The difference in comfort and power was huge and I couldn't figure out what was wrong. I assumed something was wrong with the bike so I stopped to take a look at it. Once I figured out what it was I readjusted the saddle and the difference was amazing. Thats why I want to use this bike to figure out exactly what I need.