Boris Godunov. Which Recordings?

I recently picked up Jerzy Semkow's (who?) 1976 recording of this wonderful opera on the cheap. After listening to it, I am definitely interested in finding a better recording of the work. It's not that this performance is terrible - it's quite good - it's just that I know better must be out there.

I think the problem with this recording - which was marketed as the world premiere of the original version - is that it is in fact a recording of the second versions (1874) with some of the orignal version (1868) thrown in. It thus tips the time-scale at about 220 minutes. Not too surprisingly, there are some slow spots. But at its considerable best, this opera delivers some of the finest stage music yet penned.

So any other recordings to consider? I've eyeballed Abbado's recording of the second version and Gergiev's enterprising set of both versions, but are they worth it? And are there any other Russian conductors out there with something to say? I will write that I will not consider the Rimsky-Korsakov-mutilated version. That was my first introduction to this piece, and as a composer I don't think Nicolai worthy to mop up the drunkard's drool. No, I must have the original version(s).