I have a 2005 Honda VTX 1300R with the stock seat and am looking to replace it. I have a 65-70 (highway) mile commute each way and need my posterior region to enjoy the ride as much as the rest of me does .

I am a big rider at 6'4", 275 lbs. As such, I am looking at the Ultimate Bigboy seat as a competitor to the Mustang Wide Vintage Touring seat (Ultimate has a great tag-line: "It feels like your butt has gone to heaven"; I am wondering if anyone has tested that theory). In either case, I plan on including a driver backrest in the mix (I had lumbar surgery a few years ago and the extra support will be welcomed).

I have done some research and find that the Mustang seat is recommended amongst those sites that offer evaluations, yet I cannot find any sites that offer an evaluation of Ultimate seats (http://www.ultimateseats.ca). Setting aside comfort and discussing price for a moment, I found the Mustang three-piece for a total of $600 whereas the Ultimate BB three-piece lists for $725, and that does not include shipping (as does the $600 for the Mustang trio). Thus, Mustang has the edge on price.

Has anyone evaluated the Ultimate Bigboy? Any notes on how the two seats match up?  

I don't know if you have purchased you seat yet but I too am looking for a new seat and have compared the mustang and ultimate. I have been able to find two comparisons on line and both have been in favor of the ultimate. I have also been on the national vstar forum page and the rave about the ulitmate. I am going to purchase one in the next two weeks and will give you a update if you still need one.
Rotti  

I don't know about the ultimate, but I put a mustang seat on my Honda Shadow and love it.  The main reason for the seat change was for my wife, she could only last about 20 minutes on the stock seat.  On the Mustang seat she can ride as long as I can.  

You should look at the Russell Day Long seats. They are made for the individual rider and/or passenger and they are in the same price range.