Go clad.

It would be hard to predict the painting schedule.

Hard to recommend an all wood window these days with the quality of the timber being less than it was 80 years ago and along with the long term maintenance costs.

I would read Marvin's warranty on coastal applications. Have you looked at fiberglass as well?

I suggest getting a clad window with Douglas Fir as the interior wood. If the Marvin Fir price is too high, try getting a price for Loewen or Sierra Pacific. Make sure you paint or stain every square inch of the exposed wood, as the elements WILL find a way to damage the weak spots in the wood.

My concern about an all-wood window is not necessarily the quality of the timber, but the quality of the fabrication. There are lots of one-man-shops who can build a beautiful-looking wood window, but what are the odds that a handcrafted window is going to hold up to the constant barrage of the elements? And do you think Joe Blow Windowmaker is going to give you much of a warranty when the wind and rain is blowing right through the cheap weatherstrip he installed? I don't think so.

That is a good point that ef_houseman brings up as well. Some of the reason that is highlight though, is the lack of quality in the materials. We still see +100 year old wood windows in our area that are doing just fine and were put together with far substandard joinery as compared to today's options. That said, the windows are still "ok" from a material standpoint given the quality and density of the timbers. Nothing that is produced today would stand up anywhere near that long under similar maintenance schedules. The wood...just isn't as good.

Vertical grain Douglas fir would be better than regular fir, white oak and mahogany may better than both but all are better than pine, or at least the pine that window manufactures typically use.

Thank you all for your thoughts and insight. Sounds like the clad product is the way to go.