I am 56 years old and about 30 lbs. overweight. Currently going to school so looking for something to comute to school, ride around the neighborhood and perhaps take to paved trails in my area.

Currently considering a Trek 7100, 7200 or 7300 and a Trek Navigator 200 (used for $150). My question has to do with "confort" vs. "hybrid" bikes and specifically with the diferences between the Trek 7xxx and the Navigators. Which rides in more of an upright position?

By the way, my commute to school, although just 3-4 miles, involves a fairly steep hill.

Lastly, any recommendations for shops in Orange County, CA. I'm looking for a sale but it seems that although I've seen bike shop sales over the years, there is not one going on now that I want to buy a bike.

Thanks in advance,

Mirkee