The M4 is indeed very decent, and Battle sounds wonderful, but the rest of the set is pretty uneven, IMO. I had them all at one point, but, unusually for me, I didn't keep a lot of them. (I still have the M4, M5, M8, and M9 (w/M10 Adagio).) I rather like his ending of the M8--VERY expansive, but oh so majestic. And the sound quality there is better than most.
Russell