hello! My friend have nice but awful sounding 15W amp. And Im thinking to take of all parts and build new one from it. But as Im new to this, dont know what amp to choose that will satisfy me, and sound nice! I want it to have gain, middle, treble, and bass knobs on it, and How it sound clean is most important. So we can plug pedals on that and recive nice sound! What do you think? Any not expensive valve or SS models suggestion????