Audio Aero Capitol MK II CDP: Do I need a preamp?

I'm planning to upgrade my cdp from a Level 1 mod Jolida 100 to the audio aero capitole MK II and I've heard conflicting things about whether I'm better served running it with a preamp or using the built-in preamp section and just running it with a power amp. I need advice from those who have either owned or are familiar with the capitole. Should I buy a preamp or not. My present amp is an integrated (Plinius 8100) which I will be changing. I own a pair of Paradigm Studio 100 v2s - those are staying. Listening tastes: mostly Jazz vocals and my room size is about 20x14. Secondly I need advice as to what power amp is best suited for the Capitole. My budget is about 3k and I'll most likely be buying used. The amps on my list at the moment are:

Bel Canto Ref 1000 (pair)
Bel Canto Evo II Gen 2 (pair)
Pass Labs X150 or perhaps higher
McCormack DNA 225 (if I can find it)

What do you guys think? Any suggestions?