Looking through sports ads and found a Men's Diamondback Topanga, K2 Zed 4.4, Sidwinder or IRON HORSE Quantum II all for the price of $379 normally priced $650 to $700. My son has the the Diamondback Topanga and I am leaning towards the K2 Sidewinder that has full supension. Any recommendations/suggestions? I am 41 yrs and hope to add biking to my exercise program on a moderate basis. Thanks.
