What didn't you like about using a single blade paddle?  Difficulty with boat control?  Lack of power?  Too far to reach over the gunwale?  Something else?

My only solo experience is in a Wenonah Advantage and I ended up preferring the single blade over the kayak paddle to the extent that I never pulled out the kayak paddle again after the first half-mile or so.  Yak paddles use a whole different motion and set of muscles.

My guess is you were improperly loaded if your problem was boat control or lack of power.  I loaded a bit stern-heavy with my big pack stowed aft and the lighter pack stowed forward, but as far back to center as was comfortable.  I also had my seat set just aft of center.  A backrest was also helpful for me and provided a little extra power.  Footbraces would have provided even more power.

The Advantage has a more extreme tumblehome and is a bit narrower than a Prism, so reaching wasn't a problem.  I used a bentshaft which may make a difference over a straight shaft.

Hope all that is helpful to you in some way.