I've been reading all kinds of threads for about the past hour on tube amps, changing tubes, etc. etc...and to be honest it's hard searching through all these threads because there are a lot of people saying one thing only to be corrected by someone more knowledgable a few posts or pages later.......my head is hurting from all this reading. I've got a Traynor YBA-200 on it's way to me and I just want to learn some things about it while I am waiting on it. It's my first tube amp and I am very excited. While I really don't plan on gigging with this head just because I already like my current giggin rig plenty, I mainly plan on using it at home/practice/recording...and maybe occassionally a gig or two here and there. The main thing I have read about the YBA-200 is that it distorts VERY easily with the stock tubes. I do not want much distortion, maybe a hint wouldn't hurt, but I'd really prefer it to be mostly clean. I read that this can be accomplished by replaced it with lower gain preamp tubes. Keep in mind I have no tube amp knowledge at all.......what I want to know is what preamp tubes should I replace the stock ones with to get the cleanest amount of headroom possible? I also read that you can get more clean headroom by changing the power tubes to KT88's, which seems like a more difficult task that replace 2 or 3 preamp tubes, so I will more than likely hold off on this mod til I get some time to get more familiar with the amp. Thanks so much for your suggestions!