I am looking at the Giant Iguana or the Gary Fisher Tassajara. Could anyone assist me in my decision? Both bikes sell for the approx. same price, however the LBS that carries Giant is willing to knock $100.00 on the Iguana making it $500.00, with that in mind is the Tassajara that much better of a bike? Also are the disc brakes on the Iguana okay? With the discount on the Iguana the bikes are close to $150.00 difference, any help would be appreciated.