It's Columbus Day weekend, so concerts are still a little thin on the ground (didn't find any choral concerts on Friday night) but next week things really get rolling!
Saturday: Check out the BSO's performance of Mahler's 2nd, "The Resurrection Symphony" at 8 pm. Levine is back on the podium, and everyone is all a-flutter! (Also next Tuesday.)
Sunday: Exsultemus performs the Italian madrigals of Palestrina at 3 pm. (Also Saturday at 8 pm.) This is their core repertoire; it should be exquisite.
Also on Sunday: the monthly Boston Sacred Harp sing.