So... I bought a Bluesbreaker (as some of you may know) last week. Played a couple of shows with it, and I liked it but it wasn't my favorite thing ever. It was awfully harsh and bright no matter what way I set things. Now, it's not my first BBQ, so I don't think it's really user error... But I noticed it definitely has the original Sovtek power tubes in there. I swapped out the V1 and V2 preamp tubes for some nice Brimar ones, which helped, but... I think those power tubes need to go. So my question is which 6l6 or 5881 should I get? I want something warmer and broader. I wouldn't hate it if it broke up a bit earlier. Right now the amp is very spiky, which doesn't work for me. The obvious choice would be KT-66, but as my Bluesbreaker is from 1992 it apparently won't fit them (due to the narrow cab). Ideas, gents?