Before you spend all the money on a new seat please read on:
I go for long rides every summer. Last year I took my Moto Guzzi from Princeton NJ to Key West Fl. By the time I reached Jacksonville I had developed the proverbial Monkey Butt. The mb is caused by constant pressure, heat and the lack of air circulation. I did have Alaska Leathers sheepskin on the saddle, but it did not help.
In Jacksonville I went to HD shop and they sold me a HD seat 'cushion'. This is made very ingeniously and allows air circulation. It will even make your butt but cold when riding!
M K