whats wrong with the 6922 tubes ?
Absolutely nothing but you said you didn't like the 6SN7 and liked the 6922 so you are sonic-ally closer to a solid state preamp. I'm an all tube guy so not sure what preamp would work for you, it might depend on the features you want/need more than pure sonics. Without knowing your system and budget, it's hard to make a recommendation. Are we $30,000 or less than $5000?