Hey Lil
A more comfotable seat will probably mean a thicker seat. At 5'3" are you OK with that? I prefer a leather seat instead of a naughahyde seat myself. Corbin and Mustang, among many others make good seats but I would recommend trying one out before you buy one. If you go to any of the big V-twin motorcycle shows that come around you'll see hundreds of bikes in the parking lots that you can check out and there might be some seat vendors with displays in the show. You can also get black sheepskin covers ( some with memory foam in them) to fit your existing seat from
www.amspecialtiesusa.com. They're nice as long as they don't get wet.
Good Luck