I am 25, looking for a decent mountain bike for riding to work in the city from time to time, hitting trails on the weekend. I am not too sure yet how aggressive my riding is going to be. I am looking at the Trek 3700 (found it for $349), but there is also the Trek 4300 which is $90 more. What do you suggest? Do you think it would be worth it to go for the 4300 which has disc breaks. I was told that mechanical disc breaks are a gimmick, is this true? Some other options out there are:
Specialized Hardrock ($390)
Diamondback Response ($360)
Iron Horse Warrior 1.0 ($399)
Specialized Hardrock ($390)
Diamondback Response ($360)
Iron Horse Warrior 1.0 ($399)