Replacing The Stock EH 6SN7 Tubes For Cary SLP 05

Hi

I run a Cary SLP 05 in the following setup

Cary Audio SLP-05 Preamp > Krell FPB 200 c Power Amp > Dynaudio Contour S3.4 Speakers

The Cary SLP 05 gives me that "live" atmosphere and soundstaging but I find that brass and horn instruments are still on the bright and harsh side with the stock tubes. It could be the Krell power amp. As such I thought of tube rolling and trying out some 6SN7's to hopefully give me more warmth and I guess a more euphonic and traditional tube sound. I will look towards replacing Tube Nos. 3 and 6 or the balanced buffer tubes first, retaining the stock EH 6SN7's elsewhere.

My shortlist follows below. Your opinions on how these tubes may sound in the Cary SLP 05 vis-a-vis each other is much appreciated.