Best advice I can offer is: Don't skimp on the trailer. Spending significant money on something like a trailer seems crazy, but a poor one or one not well adapted to the ramp you are using can be an ongoing PIA that can really hurt your boating experience and cost you a lot of days on the water.
Looks like you have an excellent ramp. Bunk will work fine. I'm a bunk fan, but Denny has shown that rollers can work great. One thing for Dennys advice, If the ramp gets deeper very slowly (designed for bunks and looks like yours) can you get a roller trailer in deep enough to launch without getting the brakes/springs wet? If not, go bunk.
Otherwise, does the trailer fit the boat well, correct capacity, good tongue weight, etc. A bad fit and it will trail like a wild horse (been there) and can be hard to launch and recover(been there too).
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