Hey it's me again. Over the weekend I replaced my front end of my stiletto with electro harmonix 12ax7's eh and boy did this screw up the sound it was very glassy and running the amp on channel two just gave me a high shrill sound that was horrible. Long story short went back to the messa russian 2's and eveything was back to normal and the sound was good again. I just wanted to change the tubes to see what kind of difference it would make because when I changed the mesa el 34's to jj e34ls it was a great change and gave me a smoother sound. I was just wondering what a good high gain front end would be if I ever decide to experiment again. Oh and any advice is appreciated.