Tubes for Conrad Johnson Premier 11a ????

I remember seeing similar posts like this one on http://audioasylum.com. One person commented that he preferred the 6550's and another liked the KT88's. I also own a Premier 11a but haven't tried KT88's. If you plan to do a comparison it might be more fair to compare new KT88's against new 6550's (vs the old ones that are heading south). I would love to get your opinion if you do try the KT88's. I've had good experiences buying my tubes from http://TheTubeStore.com as well as from Upscale Audio.

Buying the tubes directly from CJ? Mine came from their factory with pretty standard Svetlana 6550's and the smaller signal tubes were also readily available. I wonder if CJ does anything special with their replacement tubes for them to command a higher price?