Interested in a solo seat with backrest. Narrowed it down to 3 choices. The Harley Signature Solo w/backrest, Mustang solo w/backrest, & the Danny Gray AirHawk w/backrest. Tried the HD Brawler. Took that back the next day. To much $ for no comfort. Saw the HD Sig solo thought it was huge but looks nice on pics I've seen. Any experience/opinions with any of these is appreciated!