How much do you worry about your amp tone when practicing by yourself? I rarely break out the bass rig for practice at home. I just run straight through a cheap mixer. I find that what sounds good at home is not what sounds good in a band setting. So using the rig at home to "find my tone" isn't going to work. I thought of getting a practice amp, but the mixer is more useful and colours the sound less than a cheap practice amp would.