Bike looks great,
I have recently put a heated sargent seat on my GSA and I love it. I am not sure that BigDave would have put the extra 300 bucks to heat the thing in California, but maybe.
I am 6'5" and find the seat is not as high as my factory high setting. I can feel the edge of the "dish" of the seat on my thighs but it is not uncomfortable. Mine only has 300 km on it still and is quite firm but I do like it alot. My Wife is quite comfortable on the back as well.
I think some different pegs are next for me.