For a Goblin, your best bet is to get a fixed back bucket seat with side mounts and no slider. Mount it low (to where the bottom of the seat is touching the floor pan) and recline it quite a bit. Typically, composite seats are more comfortable than aluminum seats but aluminum seats aren't bad with a decent padded cover. Each brand fits differently, but typically each brand will fit the regional body shape -- japanese seats fit on the shorter/skinnier side, euro fits tall/skinny best, american fits big/big best... generally speaking. I'd highly recommend sitting in a few seats before pulling the trigger, seat fitment is very subjective.