Lyra Kleos or Kleos SL?

I'm considering said cartridge upgrade but would like to hear opinions on the two versions offered.

My TT is an SME 20/2 with a SME IV mk iv tonearm.
Phono preamp is a Parasound JC-3+.

Wondering if the SL version (which is lower output than the regular version) would play well with the JC-3+, or if I might need to add a SUT to the chain.  

Also, my musical tastes lean toward classic rock, blues, folk, alt-country, with some jazz thrown in for good measure.  Not sure if this is a major factor in the decision or not, but thought I'd let you know.

Please let me know your thoughts if you've had experience with these two carts.

Thanks,

Peter