Hey guys and gals, I'm new and I'm about to buy a bike. I'm probably every bit of 400-420 pounds and I'm torn between getting the Trek Navigator 1.0 (which I was totally sold on the other day at my LBS) and the Trek 820 (which is what I wanted when I walked in the door). The guys at the shop were super helpful and suggested the Navigator over the 820 since I'll be doing primarily street riding and that bike has a cushier saddle and street tires. My concern is the Aluminum frame over the steel of the 820. I've tried to search through some old threads, etc, but I'm still very up in the air over it. They both cost close enough to the same that the money is not the concern. And if there is a better alternative in the $400 range I'd be open to hearing that too! Anyway, thanks in advance for any help in making this decision!