Wow! - this is a great and exciting M3. The only real problem is that the sound is just a tiny tad on the muddy side. An increase in volume helps to clean up ANY distant sounding, midrange muddiness. The bass and treble are both very firm. Highlights include a fabulous "southern storm" - the climactic, fantasy-like passage that caps the development section of the first movement - as well as the fastest and most exciting coda to M3/1 ever! To get the coda up to that speed, Salonen simplifies the timpani part at the end. As a result, you can actually hear the fast runs in the (French)horns - something that you can never hear behind those kettle drums. I also like Anna Larsson, and I like the addition of the bass drum - doubling the timpani - on the last five timpani strokes of the entire symphony. That's very effective.
My only complaints are very, VERY minor. In the first movement, I think that the first "happy" march section (in major) could be just a tiny tad slower (then do the last "happy" march section - the one before the coda - at the faster speed; thus making a nice contrast). My other very minor complaint, is that the childrens chorus could be a bit bigger. The first "bim, bam" exclamations sound a wee bit anemic to me. Other than that, everything's great! I would have liked a bit more of the bass drum roll that underpins the climax of the long brass chorale in the sixth movement - the location of the final cymbal crash. But hey, there's seldom a good bass drum roll there; for some reason (in most cases, you can hear the two sets of timpani, but the bass drum doesn't match them).
Overall, I'd give this Salonen M3 a 10/8 or 10/9 rating (performance/sound). It's truly a "feel good" performance of the symphony - I like that.