Hey, hey, don't rush it...
I have a 16-week old daughter (I reckon I hadn't mentioned that to you guys yet) and I've been terribly busy lately. I have given the Wit M8 on Blu-Ray a quick listen and I think the sound has improved, but not too much. Considering the price, though, anyone with a blu-ray player ought to give this a go.
The M3 by Jansons is, IMHO, nearly as good as the Chailly one, and the RCO Live SACD sound is great - but so was the Decca SACD printing of the Chailly. On first hearing, it immediately ranks among my top choices, but I've only heard it once, and I was working on something, so I wasn't listening to carefully...
The Saraste M9 has quite a few flaws, indeed, but there is much to enjoy, too. Alas, I have have so many great M9's already, that this one will end up somewhere at the end of the list. No real urgent need to get this, though, for any of you.
And the Abbado M7 is an excellent addition to this cycle. I absolutely adore Abbado and his way with Mahler, so I'm not entirely unbiased, but I'd urge all of you to add these performances to your collection.
Not a very detailed review, I acknowledge, I'll try to get back after I've heard these a few times with a more detailed description.
Cheers!
Freddy