I'm no expert, but from what I know, its personal preference. Solo's do have a timing issue, but its not the same as a dual cam's syncronization timing. I personally like the feel of a solocam far better then a dual. A properly timed dual cam is probably easier to tune then a solo also.

With the new technologies out there, solo's and dual's are pretty close though. Its really a matter of what you feel the most comfortable with.