I built my own. If WRP had a seat at the time, I would probably have had that one. But lower the rear so it wasn't tipped up at such an angle.
I despised the Boss seat for a few reasons(although not important to other people, these irked me)
The cover was glued on. Despite the closed cell foam, the seats do hold some moisture in the open cell foam(the cushion) and it can equate to a handful of lbs over a year of riding.
The wider taper to the rear of the seats also drove me nuts. I wanted a narrow seat, front to back.
The side taper kept my legs bulged out instead of straight. I didn't want to feel like I was riding a horse.
Not to mention the zippers or snap quality...
And I thought I could do better with storage capabilities....Ended up with enough room to fit a probe, shovel, and 2.5lb nitrous bottle under my butt. I use the space for tools, 2 bottles of water, and the aforementioned 2.5lb bottle.
I ended up with this. Sold quite a few. And still rock them on my sleds and a few friends sleds in the area.
I did end up with a BOSS seat on my M-Series sled tho, so not to say that they are bad by any means...