Having ridden some 400-500 mile days on my Tiger, I would suggest that highway pegs would be a very wecome addition to the bike.
I have the crash guards, and plan on rigging something that will work. The only challenge is that the diameter of the crash bars is not that of a standard frame member, and most pegs have too large a diameter clamp. This is obviously not a big challenge, but something you will have to work with.
As for the Corbin seat, I find that it is a relatively hard seat, and will wear you out on a long day. That gel seat sounds pretty good to me. I plan on finding one of those strap on pads for longer rides.
Ride safe...