OK so I've come to the conclusion that I am keeping my Egnater Rebel and matching 1x12 cab. After 2 band practices I have concluded that the Rebel does everything I want it to do and for my purposes there's plenty of clean headroom an tap. Here's my question. I am relatively dumb when it comes to tubes. I am thinking about experimenting with different tubes in my rebel simply to gain a bit more headroom and warm it up a bit. I have been told that most amp manufacturers use the the cheapest tubes possible in their amps in an effort to maximize profits. Is this true? Can anyone recommend some preamp tubes and/or power tubes that will do the following: *Add clean headroom *warm up the sound *retain the current level of distortion *possibly clear up the sound when run at full gain(more articulation) Please don't recommend NOS tubes unless they cost under $25 each. I am not going to pay huge money on tubes.