If you think a m78 is just as accurate, and easy to maintain as a Classic Green, I'd like to know how. CG, you pop two pins, and have at her. M78, you remove the cover, with your optics, and yes, cleaning is easy, but you just lost your zero(if you had one to begin with). In my experience, the CG irons also win over the m78 irons, and I have shot m78s back when they were still new enough for the tritium to work.
I made the comparison between the m78, the 858, the m305, and the CG as these are 3 non-restricted rifles that are in each of the calibers that m78s were imported in(that I know of. I know hunters in other calibers). And from my experience at shoot each of these, the 858, m305, and CGs are as good, or better shoots then the 78 in their respective calibers. I do agree with you that the 78 is better made, and looks better then either the 858, or the m305, however.
If you enjoy m78s, that is cool. They make decent collector relics to an unusual Government decision.