Hi every one I am looking to upgrade my tubes for my new Cary Audio slp-98p with phono. I had just replaced the 12AX7 to JJ electrics from the original chines brand. Which the JJ's sound nice but lack the low end bass I think. Would a matched set of gold lion 12AX7 ann 12AU7 be a good choice for the phono preamp tubes, and my new ortofon bronze 2m. let me Know your thoughts and recommendations.