Personally for the tender am planning on going with the Walker Bay,
it's as roomy as an inflatable, is strong, and is rigid making it easier to row and sail.
there is 8-foot version for 2 people
and 10-foot for 3 people (family size)
the sail power, would certainly make it easier for you to surpass currents, and drastically increase your range of exploration.
remember when sailing to avoid tipping over, you can generally let go of the mainsheet (propulsion) but always hold onto the tiller (steering).
here is a review of walker bay: http://www.sailingbreezes.com/sailin...2/walker10.htm
"a full-length molded keel from the transom to the bow. This adds stiffness and helps the boats track straight when rowed or towed."
"They usually tow better than inflatables. They always row better, especially in wind."
the mast can be disassembled into two pieces for easy storage.
seems like it would require some minor modifications to become an optimal sailing dinghy, like adding hiking straps for higher speed sailing.
though its great as a rower and that's you're main activity anyways.
Also it has the option of getting inflatable edges for the kind of stability you may be used to in the inflatable, and minimizing chances of swamping the boat when heeling during sailing.