while waiting on a preamp for my DEFY 7/6550's

The pre will arrive in 2 weeks. So i decided to pull 4 of the 6550's in the Defy and swap out the KT90's in the JOR. Man I sure hope the Defy does not sound like the JOR with 6550's. Because if it does I'm not going to like the Defy with 6550's for my classical. Way too tubey and bloated, all the fine definition and sparkle from the KT90's was gone. I guess I'm going to need to buy ...12 Czech KT90's. Gonna cost me a bundle. Any suggestions?