Check out the MXR M80, it's $139 new. I bought one a few years ago (no idea why) and really like it. I've used Tech21, Radial, Demeter, Groove Tube Brick, etc., so I've tried a number of them. I didn't want to like the MXR as much as I do, based upon nothing more than the fact that it was cheap. It's not a true DI, it will color your sound at least a little, but the tones it produces are pretty impressive for both active and passive basses. Just my $0.02.