Tube rolling?

Anyone using Genelex Gold Lion KT-88 tubes? I'm wondering how much improvement there would be rolling from Electro-harmonics. I'd need 8 matched for a Cary CAD 120s amp.
I use them in my Cary SLI-80F1 and I am very pleased with them. The SLI-80 came stock with EH KT-88's and I have found the GL to be a much better tube in all respects. I have recently changed to the GL KT-77's and like those very much as well.

Thanks Chuck. I have 8 GL's that should be here any day. BTW you have a nice Int amp. I had high speed hexfreds and cardas caps put in mine, so with the new tubes it should sound even better.
Used Gold Lions in my Ayon Spirit 2 , enjoyed them very much, but tried Shuguang Black Treasures and found them to be a few notches up - got them new thru member trelja
The GLs are a definite step up from the EH in my Jolida based amp. I liked the TS 6550 better than the EH also.