I have an EL-Nikkor 50/2.8 and 80/5.6 and a Componon-S 150. I am thinking of getting either an EL-Nikkor 105, or a Componon-S 100 for 6x6 and 6x9. I am partial to Nikon lens, but was told by my college instructor that the Componon-S is a better lens. But from my research on the web, it seems that there is very little real difference between the EL-Nikkor and Componon-S lenses. I would like to get feedback of those with experience with these 2 lines of lenses about any "real differences" between them, or are they even enough that I should just get whichever I can get the best deal on?