AlphaV, thanks for your reply.
First, I will take your advice and avoid hydraulic brakes, which Kona has.
Spec actually has mechanical brakes, as does Trek.
Do mechanical disc brakes really take so much space that I need special accessories that are wide? I didn't catch that if that were the case.
New questions then:
1. Spec or Trek?
2. If no disc brakes, what are your suggestions?
Thanks!
EDIT: i see why you said that Spec was hydraulic. The one I saw is not. Thanks.