I owned a 26D for 8 years, rigged it for cruising...Autopilot, GPS, 16 gallon fuel tank, traveller, custom sails and rudder etc.
I've had my '02

since '04, also highly modified for cruising. The D is a good performing day sailer. The

is a slower sailer by 1 to 1.5 knots depending on point of sail and conditions, however the

is a more comfortable and versatile boat. From Oceanside CA to Catalina is 50 nautical miles powering into the wind it was 8+ hrs in the D compared to 3 hrs 15 min in the

( I miss the sailing speed of the D for the way back ).
When factoring towing weight for a Mac D or S, allow for the 1200 lbs of ballast weight at the launch ramp that you will have to pull out of the water. The

and

ballast can be emptied before the boat is retrieved. I blew a cluch on my V6 Nissan truck pulling my D out of the water. I still use that old truck to pull my

out othe water, I just wait for high tide and pray.
