> Tangentially, and pardon my ignorance, I'm not a biker: I can't understand people who shell out thousands of dollars for a bike, are these so much better than a $500 one?
Yes, they're considerably better - the price is directly reflected on aspects such as durability and weight of the components (frame, gearing, wheels, etc). Keep in mind, though, that buying the most expensive bike around just to commute 10-20 miles to work won't be a good investment - you should go for a good quality one when you're serious about long distance training or hard core mountain biking, for instance (usually after you're already practicing whichever style you prefer - a lot of people invest in an expensive bike upfront and never really use it to its full capacity).
(or assemble your own. It's fun, specially for hackers/geeks!)
Yes, they're considerably better - the price is directly reflected on aspects such as durability and weight of the components (frame, gearing, wheels, etc). Keep in mind, though, that buying the most expensive bike around just to commute 10-20 miles to work won't be a good investment - you should go for a good quality one when you're serious about long distance training or hard core mountain biking, for instance (usually after you're already practicing whichever style you prefer - a lot of people invest in an expensive bike upfront and never really use it to its full capacity).
(or assemble your own. It's fun, specially for hackers/geeks!)