About three years ago I got a new Venture tandom axle with rollers and brakes. I love it. It has the torson axles, I'm a firm believer in those, and the rolers make getting the boat off the trailer much easier. Personally I would not have a bunk type trailer. These appear to be fine if your boat is in the water most of the time and the trailer is only used occasionally. I never know what conditions I'll have at the ramp, with a bunk you may have to have a high tide.

Good luck