I think the time has finally come that I retube my 1982 Mesa/Boogie Bass 400. I got this thing in pristine condition, but with the original Sylvania 6L6 tubes. I am playing too many gigs these days to be constantly worried about having an outage irght in the middle of a set. What I am considering are JJ's KT-88's for the power section. I am not sure what preamp tubes to use. I am interested in as much clean headroom as possible and would like to have some difference between the channels- maybe to enhance/complement the subtle differences they naturally have. Channel 1 is suited more to active basses and is a little friendlier/smoother sounding. Before I picked up an ABY switch, I used this channel primarily. Channel 2 is suited for passive basses and has a slightly harder and less forgiving edge to it. I rarely use it by itself, but when I Y out to both channels, I have most of my volume coming from Channel 2 with a good dose of Channel 1 softening the edges a bit. Any thoughts? Or should I just go JJ all the way?