KT-120 Tubes

Folks,

I have recently purchased an Audio Research VT-80.  As wonderful the amp sounds out of the box with stock Tung-Sol's KT-120,  I am curious to hear from anyone trying a quad of the Shuguang KT120's. I don't want to make the decision of trying them out based on Stereotimes review of Shuguang tubes, so any feedback on their sound would be appreciated. 

Any alternate suggestions on Sovtek 6H30's tubes is also welcomed.  

PS: The VT-80 is being used for mid's and high's in an bi-amping setup with McIntosh MC601's. 

Cheers!