MJ:
I saw my buddy last night and got the skinny on his new trailer.
As I said he has a step lift 20 with a 150 yammy.
It is a loadrite with 24 yellow rollers. He got a bigger(longer) than needed because he is the king of overkill. But anyway he got the one for a 20-22 footer with brakes, singel axle, 77" between fenders, 15" tires. With a capacity of 3600 lbs. Model No. 22360096RB. You can find it easy on their website.
http://www.loadrite.com
Follow the links to roller trailers and they are all listed there.
So the main info is he paid about 3K for it mid last summer.
He says it fits his boat really well after some minor adjusting.
ALso the new models are much better construction than in the past.
Hope this helps, Good Luck.
V.