If are looking for a ride that goes ping, then K Custom 20 is very good. (but it doesn't crash).
If you are looking for a K that does both ping and crash, the 22" K Dark Medium Ride is worth trying. It has a more ping and a little less spread than the few 20 K Custom Darks I have tried. It has a great (huuuuge) crash sound though, and a number of sounds between ping and crash.
I use mine for Rock, although it's very versatile and works in lots of other styles too.
Thanks, guys! I just ordered a used 20 dark K ride for $170! The HH raw bell rides are a bit more expensive and I personally like the K's sound a little more.
Works for me (and I'm not a jazzist). But my Rock may not be your Rock.