Well, I got Rollerberg's Dragonfly Amp (thanks again

), and been tinkering with it. I now see why everyone thinks it's gimmicky (that sound from touching the tubes is IRRITATING). I like the idea of it, and sofar I like the sound, but we'll see how much I like it in a couple of weeks.
I moved it around on the back and front of my bass, sound changes a little but not drastically. The interesting part was when I compared my C bass with my MTD Kingston. The MTD sounds a little more muddled through my amp, and what I heard through the dragonfly was very representative of that.
The tone isn't the same as it is through a real amp, but I would totally be able to tell the basses apart in a heartbeat by listening to them through this.
I might just use this regularly instead of my amp. The way my place is set up, it's a pain to keep moving the basses around and this might just be the ticket.
Thanks to everyone that contributed - I appreciate your input.