Is it really neccisary to have dual suspension oh a dh hill bike? The trails aruond here arnt really that long...but there steap. The bike that i am looking at doesnt have dual suspension, but its alumium, has disc brakes, and adjustable front shocks. What that be good enough for a begginer. (i am some what of a seasond rider, having bmxed there on the jumps.) Or is there any cheep dh bikes? I am saving for a new mx bike so maybe less then $300.