A couple years ago when I bought my acoustic I bought a Sabine MT9000 tuner for I think $30. It works great with my acoustic, but with my Dean Edge fretless 5-string bass it takes forever to register a note, and sometimes displays the wrong note. Since this is my first bass (and also a fretless) I need a better tuner so I can work on my intonation. Do I really need to spend $100 on a Boss TU-2 or $190 on a Peterson? I just want something that will register the note quickly and accurately and work while I'm using my amp. If it matters my head has a tuner output and a tuner mute switch, so a pedal tuner isn't strictly necessary.