My last previous trailer was a Hallmark trailer - admitedly it was 4 or 5 years old, but was rusting in many places all over... I was glad it was not braked since I would have probably ended up replacing 50% of the trailer.
On the Humber, I got a Bramber trailer, rated for upto 950kg capacity, and it's full rollers. To be honest, I hadn't heard much of them, but the build seems ok, and the thing's a doddle to handle.
I quite happily hitch upto the van myself with it, just lift and drop on (cos the boat is perfectly balanced on the trailer), and also I can either drive or winch the boat onto the trailer with ease.
One niggle at the bow though with one of the supports which was rubbing the underside of the tube, but that was quickly sorted, helped along by a length of scaffolding pole
It's a braked trailer, and has 'sealed bearings' although I do not know how long they will last..... iirc the book says 25,000km, which I think is a bit high for a boat trailer.