While my BadCat AB 50 has some excellent tone, I've been astounded at how little headroom the clean channel has. I've tried everything from turning the bass, treble, and brilliance all the way down, lowering the guitar volume, but it starts to break up at 7:30-8pm.....I've never had a 6L6 amp before, but for 50 watts of any type tube, this seems extremely low. The power tubes are probably very old. According to the dealer who I bought it from, the amp hadn't sold for a really long time because noone really knows about this BadCat model due to no advertising, nothing on the website, etc. I think that my first step here would be to get a new set of tubes, and have them installed and re-biased by a pro. I'm not trying to be cheap here but I also don't have ridiculous funds. What are the best 6L6 tubes one can get for under $200 a pair? Also, should I consider replacing any of the preamp tubes for more headroom? Thanks!