Thanks for the advice, everyone.
As for the Salonen/Dresden Staatskapelle M3 from the Leipzig Mahlerfest on ArteWebLive, I saw part of this and was greatly impressed. Unfortunately it doesn't seem to be available any longer on ArteWebLive. Do these performances eventually end up on DVD? I wanted to go back and listen to the first movement again. I think the trombone player flubbed a note right at the end of his first big solo, but I wanted to go back and hear that again to be sure. Anyone else notice it?
For now, I've stuck with my Bychkov CD as my reference, though as Barry said, it is a bit broad. However, for a novice trying to follow the score, that's not necessarily a disadvantage. I also downloaded a copy of Chailly's M3, and really enjoy that performance. I think I need to hunt that CD down, or just get his box set (seems roughly the same price as trying to find just the M3 disc used). I also heard online a radio broadcast (I think) of Jansons/RCO - I assume part of which was used for the CD release. I think I will pick that one up when it's available on Amazon US. (soon, I hope? anyone know?)
I'm amazed as I spend more and more time with Mahler's symphonies, how many details are there to repay you for the time and effort you put into them. M3 is such a sprawling work, but I'm really finding that I enjoy it very much.
Cheers,
Herb