I just bought a new Progressive Dynamics PD4135 for my trailer.
I haven't installed it yet due to lack of time (and now it's getting colder...)
My plan was to initially go with a deck-mount converter like the PD9130, and use the existing circuit breakers and fuses (or install a new DC fuse panel and new push-button AC breakers).
Then I realized that going with a all-in-one converter like the PD4135 wasn't more expansive, was simpler to wire and install, and offered the option to upgrade the trailer from 15A to 30A AC service, which I'm planning to do (not that I will be using 30A regularly, but I'll have the option).
The main thing on upgrading to 30A is simply getting a 30A main breaker instead of 15A, and replace the power cord to a 30A-rated, 10AWG RV cord. I found a 30A RV extension cord at Costco for $42 (real cheap) that I will be using for this.
My new converter has 6 DC and 5 AC branches. I'm adding both AC and DC voltmeters/amp meters, USB charging ports, new LED lights
, new battery, and various switches to control all of this.