too bad you couldn't pic more than 1 option above - strengths & weaknesses to each builder/design. If you had a "choice" - it really depends upon your needs - what kind and size of boat - where you launch (ocean, lake, river, etc.) - how far you travel/trailer - how much maintenance you want (brakes, weight restrictions, etc).
Put your hand on the bearings. They should be slightly warm - but not hot. Keep a grease gun handy and give a couple small squirts after the boat is either launched or retrieved - esp. in sw - to drive the sw out of the bearing. Keep a couple spare trailer lightbulbs in your glove compartment.
King trailers are nice because you can change the hub and spindle with just a large nut and cotter pin. Most trailers the spindle is part of the axle and if you waste a spindle it can mean a whole axle replacement.
http://www.kingtrailers.com/
A buddy has one and he just had a full spare spindle, hub, bearings, and tire mounted on his trailer.
Could do a full charge out in less time than to swap a tire.
My 23' Hourston has been on a trailer for 16 years - Highliner dual axle with electric drum brakes switched to electric/hydraulic disc at time of last brake rebuild. I've had no issues getting parts from Highliner when needed. Agree with other comments on maintenance.As some of you know I am in the market for a tandem trailer for the 23' Hourston and not sure the good, bad and ugly,,,
I would like disc brakes with electric/hydraulic, I am thinking EZ Loader
My 23' Hourston has been on a trailer for 16 years - Highliner dual axle with electric drum brakes switched to electric/hydraulic disc at time of last brake rebuild. I've had no issues getting parts from Highliner when needed. Agree with other comments on maintenance.