Sunrise Verde vs. Okna 800 (Envirostar)

+1

I used be concerned about the light as well but with the cost of energy and the improvement that you garner from triple pane, it is a good investment regardless and the offset isn't that bad at all.

I can't say that I've ever had anyone complain about the loss of light. Biggest difference will probably be the combination of low-e glass and a smaller frame in an insert installation, so that next step to TP is fairly minor.