I can't really decide, because I prefer the music on GDoW and Chimera to the poorly written stuff on DMDS, but none can deny the atmospherics of DMDS. Persoanlly, LiL is probably the only album that I've truly enjoyed all aspects of. Dead was such an awesome vocalist.
As far as ideology, I couldn't give less of a fuck about that. I think Euronymous was a delusional fool who truly thought he was more brilliant than he was. I'm glad Varg killed him, beecause now Euro's dead and Varg is in jail, so the world loses TWO losers as opposed to one. If some of you feel that this has affected the band's performance, tough shit. The only loss the band encountered was when Dead killed himself. In all honesty, the band is overrated, moreso for their antics than their actual music. Hellhammer is quite the drummer, however, and I believe he reserves the right to keep the band going as long as he plans to drum like a motherfucker. IMO, Chimera had just that, so Mayhem's still good for me.
As far as old vs. new, I say they tie.
And I know that this post will anger people. Let me have my opinion in peace, dammit.