after checking out a few more bikes (kona,jamis, and cannondale) I've decided on the fisher2+disc. My lbs doesn't have the disc model in stock but can convert a reg 2+ to disc. Would it be crazy to not do both front and rear or do you think just swapping out the rear is enough. Also they said they had a carbon disc setup for $100 bucks more (f&b) over the magnesium setup. Worth it? Thanks in advance and for all your suggestions so far!