RBC, Prolijo, GT...
Thanks for the suggestions.
I didn't mean to say that we have absolutely no interest in ecotourism, what kind of Philistines would we be if we ignored the natural beauty of C.R.? While I cannot see the brilliant plumage, I still enjoy the song, and aside from concerns about running into the odd culebra or bullet ant, I'm pretty cool with nature walks.
We spent three days in Manuel Antonio last year, and I thought it was very sad. the amount of gringo-driven development is killing the entire area; the park now 33 years old is in brutalized condition, although very accessible. Playa Escondido and other beaches within the park are okay, but I wouldn't let my worst enemy swim off the public beach at the park entrance.
The constant sound of earth movers, Skil saws and jackhammers shatters the pristine ambient sound of nature. Loud music from street dances in Quepos, four miles distant shatter the night. Spoiled, rich gringo bitch-children pump da beats through bass cannons and race their vehicles up and down the beach road at all hours. We've phucked up another Paradise.
And I can't imagine the idiocy and crowding that surely accompany high season; we were there last September, and thought the rude gringo behavior was almost insufferable then. Can't imagine the scene at full occupancy.
That being said, for the sake of its luxury level, we will probably incorporate a visit to M.A./Quepos as part of the Pacific coast tour.
We're also planning to do a couple nights in Golfito, including the ferry trip to Pto. Jiminez; the remoteness and unspoiled beaches appeal to us, although we understand that it's going to be hotter than Hell's hinges.
While zip lines might not be prudent, I am a fairly experienced rider, and a horseback tour will probably be on the menu.
Side note: It's humorous and embarrasing at the same time to interact with nervous tour operators, who fear that my blindness will put me in danger, or cause problems for them. Usually a gentle, diplomatic talk is all it takes to reassure them; at other times, I'm forced to simply walk away. As I haven't done too many organized tours in C.R., I haven't yet hgad this problem, but it has certainly been true in other places I've traveled. We'll see how Hoss Caratera feels about me mounting one of his riding horses...
Two weeks is actually not that much time. One could whirlwind through the entire country during that time frame, but would not get much of a chance to stop and smell the guaria morada. Since the gringa lady wants tropical sun, hamocks and little drinks with umbrellas, we'll probably tailor much of the visit to that kind of activity. I'm still however, open to more suggestions.

Thanks again, guys.
Paul