High end vinyl will outperform wood by a country mile. Okna is very solid and will serve you well,
I am pretty sure there is a very good/ reputable company in your area called "HomeSealed". They do exceptional work and the owner Brandon is one of the most knowledgable window contractors in the business. At the very least i would contact them.

Thanks for the recommendation. What is the difference when you say "high end" vinyl? It seems like there are some brands that are more recommended than others, but what is the difference?

Stew - High end has to do with extrusion methods used for the frames of vinyl windows - low end will be flimsy - high end will be stout.

The higher end units do a FAR better job on air infiltration and other insulating factors.

Sunrise (Restorations and Vanguard) as well as Okna 800's are both high end mfr's.

As the other poster said...Brandon at HomeSealed would serve you well. He will certainly educate you on all window aspects!

Another vote for the good folks at HomeSealed (not to sound like a homer).

I have personally referred close contacts to them and they did fantastic work.

Great company + Class leading products = Great option for you.