I have heard the gel seat is a waste of money. It isn't more comfortable over long rides and in fact, when it gets hot in warm weather, the thing is downright uncomfortable.
If you really want to customize your seat and make it more comfortable, do what I did for my cruiser, send the stock seat to Sargent. They rebuilt my stock seat with their foam, my choice of leather or synth covers, and piping color around the seat. And it is really reasonably priced. DO IT! You won't be sorry. Oh, and they sell one already made for the Triple if you like. I swear by their stuff
http://www.sargentcycle.com/custserv.htm
http://www.sargentcycle.com/triwssp3.htm