Jerry:
The ''planing hull'' designs you see are still displacement hulls tho'' they more readily plane when sailing downwind - normally while flying a large chute you would be unlikely to fly while cruising due to small crew, auto-steering device of some kind and/or reluctance to risk the sail/
rig damage that can result. (Races out of SF or SoCal to Hawaii are classic opportunities for these boats to strut their stuff, but it doesn''t mean you''d sail to Hawaii the same way...).
Offsetting the planing capability is your possible need for less draft (these hulls can be quite deep), an underbody that handles a grounding better, a more protected rudder (vs. a deep, deep rudder depending on the strength of a single rudder post), more stowage & equipment space than provided in the shallow/wide hulls...and perhaps a price tag less damaging to your cruising budget than these boats demand given their more exotic materials.
We''ve seen a few J boats (the cruising versions) in the Caribbean now, and they may be one compromise option you could consider - well built & at least laid out with cruising needs more in mind. Well built (using the SCRIMP method) in RI but, again, pricey by the standards of most us mere mortals.
Jack