Of those new production tubes that were given to you the Groove Tubes are the best IMO. Try them in the amp. As previously stated those RCAs will be hard to beat, so keep them in the CDP. Of course a lot depends on whether you are using closely matched pairs.
If I recall my research when I was considering a Jolida CDP a lot people like the black plate 5751s, a lower gain version of the 12AX7. A good source to look up on the Internet is Joe's Tube Lore. There is a whole section of the sound characteristics of 12AX7 and 5651 tubes (others as well). I think in the long run its best if you experiment on your own (with those tubes you have). A lot more fun too. Maybe later you'll decide to try some others.
If I recall my research when I was considering a Jolida CDP a lot people like the black plate 5751s, a lower gain version of the 12AX7. A good source to look up on the Internet is Joe's Tube Lore. There is a whole section of the sound characteristics of 12AX7 and 5651 tubes (others as well). I think in the long run its best if you experiment on your own (with those tubes you have). A lot more fun too. Maybe later you'll decide to try some others.