I've really enjoyed "Bach & Beyond" by Masaaki Suzuki and Collegium Japan( on BIS ) It has a few old warhorses by JS and Handle, but also has some nice Monteverdi,Sghutz,Ahle, Buxehude,Kuhnau, Zelenka and CPE Bach.
I've also really enjoyed the SACD set of Beethoven quartets by Prazak Quartet on Praga Digitals.