tube recommendations for audio research LS-16?

Bought a new set of tubes on a whim. Figured the ones I have had been in place for several years... maybe I'll try something different...

So just dropped a little over $400 on a set of 6H23/6922 type 3. ..definitely more open and airy, very clear mids and plenty of top end energy...not so sure this is an ideal match for me. not feeling much energy in the mids, and the top end is clear and bright, accentuating the microphone and steel strings. Joni Mitchell sounds a bit shrill...seems like  these tubes would be great in a pre- that leans toward the warm and lush.

I would never suggest the LS-16 sounds particularly warm or lush. I am likely to be wrong, but my impression is the LS-16 could benefit from just a touch of warmth, more dynamic liquid mids, and a bit more bass energy?

opinions? suggestions?

What about the Amperex gold pin 7308 or the Mullard E188cc/7308? I'm thinking the Amperex.

or should I just stick with my Electro-Harmonix 6922EH?

Any suggestions for tubes for a Reference Phono 3?

kind regards!