hello all! ive got a 400+ head, running it with an aguilar 4x10 cabinet. the sound gets too grungy too soon for my tastes. id prefer it gets louder before giving me breakup, both in the pre and power sections. right now it's got svetlanas in both sections ive retubed guitar amps before but never a bass amp so this is some new territory for me. i use pedals for different distortion sounds (EH english muffin, zvex woolly mammoth, prescription electrionics COB), i dont really need the amp giving me too much additional distortion. id rather the amp just be amplifying what im putting into it, staying clean but full and warm ya know? i played a brand new 400+ at a store and loved the sound. real clean and bright, plenty full. im guessing it had mesa tubes in it, which my very well be the answer. what tubes do you like for an amp like this? thanks!!