I had a stock America seat redone with a gel pad and a deer hide covering. very comfortable, no vibrations. Once the seat is warm, you sort melt into it.

05 speedmaster - 1100cc, 11:1 racing pistons, Carillo rods, thunderbike cams, ported and polished head, 2mm over intake and exhaust valves, Barnett kevlar clutch, scepter pipes, oversize manifolds, 45mm HSR's, TTP stage 4 firestarter