Dave, I believe we both baselined with Jim's recommendations i.e. GL KT88s/RFT 12AU7/RCA black plate 12AX7. Last year, I swapped the RFT's for NOS black glass Tung Sols for a marked improvement in overall musicality. The Tech Tubes beat the snot out of the RCA's, if you want accuracy/clarity and don't want that tube to add any midrange push. Having said this, I never found the RCA's to be particularly lush, but they do have a slight push in the midrange not found in the Tech Tubes.
In the end, it's all about personal taste and synergies, of course.
In the end, it's all about personal taste and synergies, of course.