PL,
The Rolling Lock is just plenty strong, period. Pocket Hobbit is a specific fighter, and the need for a secure locking is just too important, especially if you're planning to use the teethy spine part (they're not serrations) of the knife. I have both the old version (bar release) and the new one (button release), together with some other REKATs, and so far have never had any problems with rolling locks.
Like I said it's a specific knife, and mine came with front release kydex sheaths. With a little practice you should be able to deploy your knife lightning fast. The only problem I have with the Pocket Hobbit is that it's too big and too scary for people around me (sheeple!).