The porro's are not as expensive to make as a good roof. Much simpler design.I didn't include Porro design. I have had the Bushnell and Swift Audubon (might be the same), and I did love them and still have both pairs. I find them not as easy for travel purposes. I feel they do have advantages but are not in my radar now. I am not familiar with the Kowa YF, Yosemite. I do think that at the cheaper price point they are, they are actually better quality and durability than that same price point for roofs. Not sure why? Do you feel they are made better or just not as expensive to make for good quality?
Torview....I have decided to keep the Nikon 8x30HG as well as the Meostar 8x32. I love them both.