Sails yes, Mast no
At 625 square feet, our asymetric cruising spinnaker more than doubles our sail area. It works great from 60 degrees off the wind (in light air) to a broad reach.A 155 genny has a similar impact if you want to sail close to the wind in light air. (Although our shoal draft model simply doesn't do much better than 55 degrees made good.)A modern mainsail with full battens and a large roach can also add sail area.So I think you can get all the push you need in light winds by talking to a good sailmaker, and coming up with the sails you want.On the other hand, Lady Lillie, a '77 h27 will push hull speed (6.2 knots) in 15 knots of wind with a 110 genny, and the semi full batten main offered by Doyle on this site. We have averaged over 7 knots for an hour or more using this set-up in higher winds, or the asymetric in lower winds. At that speed, we are really getting a thrill, and making time to the next port. If the boat is making over 8 knots in gusts, it is getting ready to round up, or broach - not something to make the crew or captain happy.So we are very happy with our sails, and the options they give us on Lake Erie. I would strongly recommend against changing the standing rigging, or especially against a taller (or shorter rig). The boat is designed and ballasted for the rig it has, and a change would lower its value in my (and the market's ) eyes.A sprit pole to carry the asymetric farther forward would be a good option to really fly on a reach in light air. Otherwise, I think the right sails will give you all the power you need.DavidLady Lillie