I sure won't be buying 57 discs of Mariss Jansons, even if the BRSO is my favorite orchestra these days (it is).
Fingers crossed that this will be available digitally so I can get them individually, or at least listen on Spotify for now until an official BRSO/Jansons Mahler box comes out.
I think I'm more excited that the BRSO has another complete Mahler cycle than the fact it's Jansons. Though to be fair, I generally like his Mahler.
My favorite two CD cycles are Kubelík/BRSO and Chailly/Concertgebouw, and Jansons got a chance to do a cycle with both of those orchestras. His Concertgebouw one was clearly inferior to Chailly's. Although Kubelík rules the Wunderhorn symphonies, Jansons may be able to best him in the latter symphonies. I just need to hear 6 and 8. I'm pretty sure Jansons' 6th will best Kubelík's, but it's hard to top Kubelík's vocal forces in the 8th, and I like his quick way through the work. I admire Kubelík's 7th, though I just wish the first movement introduction were slower. Jansons' BRSO 7th is pretty damn good.
If Jansons didn't screw with the tempos and orchestration at the end of the 5th, that recording would be among my favorites. And I really like Kubelík's way with that work. All in all–and amazingly–Kubelík's 50 year old cycle still might remain the BRSO's best Mahler recordings as a whole.