CD player for my system?

naim 3.5 with flatcap will mate nicely with your gear

Readster-- sorry to be so long in answering your quest.

Yes, I tried the EH 12AX7's in the jolida.Also the Ei Elite gold pins. Both were more bright sounding than the stock tubes that Jolida supplied. These were the least favorite to my ears of all the tubes I rolled in and out.

I liked the Mullard CV4004 somewhat and Tungsrams were very "fast" sounding or zippy, but did not have much body.

The Amperex, Siemens and Brimars were not as good as the Ei's non cryo'd ECC-83 gray plate.

All of the 5751's I used RCA 3x BP--Raytheon 3x BP and Sylvania 3x JAN..GE 3x Gray Plates... were smooth, but just too closed in sounding and lacked openness and dynamics.

The Cryo Ei Gray plates are the winner for me.Smooth and warm like the standard Ei, but with better depth and transparency.Amazing tube!

You are the absolute perfect candidate for the Jolida JD100. But listen first.