I have a /13 CJ11, an 11 watt head with 2 6V6s and matching 1x12 cab with a Celestion G12 Vintage 30 (black label). Has great low mids, but the top end is a bit too sharp or piercing for my tastes. Any recommendations for a speaker that will round out the top end and retain good low end definition? And would different 6V6s or even preamp tubes make any difference? Thanks again, amp guys!