Almost every 5th Toyhauler manufacturer makes bumper pull toy haulers. Depending on what you want. Heartland, Keystone, Dutchmen, Grand Design, KZ...and others.
As far as quality...probably KZ or Evergreen Amped. With anything you get..do your homework and look at the basic construction of each, immenties that some have and some don't. Depends on what you want...and look at each manufacturer warranty. Some are better than others! After shopping around for a couple of months, I recently bought the Evergreen Tesla 3950, but I did look at the bumper toy haulers that Evergreen has...and they are very nice.
You find some good deals on Heartland, and Keystone, but check every single item in these units. Some will have no major issues and some will have many. I found that the quality in the most popular selling units isn't very good due to the manufacturers trying to produce so many..so fast to meet demands for certain models...not all.
#1 All manufacturers will have issues, just buy from a good dealer. A good dealer will take of many issues for the manufacturer.
#2 Test your RV out...get your dealer to agree with letting you live in it on their premises for a couple of days before you take it out. All dealers will go over the operations with you before you leave...but that doesn't necessarily mean they test and operate every system on the RV before you leave. Learn from my mistake..
If your able to live in it on the dealer premises for a day or so...test every system. If you have any issues, they will correct the issues much faster to get you out of there...
#3 Since your hauling expensive toys...look at the quality of the tie downs in the garage area...are they just mounted to the plywood floor (bad) or mounted to the frame (good)...they will all have ratings. 2500lb...not so good...4000lbs to 6000lbs good. When driving over rough roads (it doesn't have to be a great distance) poor tie down can be ripped out.
Hope this helps you...good luck!