The Dean Exotica is an excellent bass for the money (especially since it sells for $399 but I got mine new for $217!) and the DMT I2EX preamp, Aphex Aural Exciter and Big Bottom Circuitry make it a tone monster...I have mine set out of phase and I usually keep the enhance switch on.
I put on a set of D'Addario black tapewounds and decided I'd found the perfect strings for the sound I was looking for.
Of course, feedback with an acoustic bass can be a problem, as anyone knows, so I thought I'd try a Planet Waves soundhole plug and...wow! I mean, I know it's designed to eliminate feedback, but it also improved the tone of my Dean Exotica…and noticably!
As soon as I plugged it in and started playing, from the very first note, I could hear the difference.
This bass is on sale at Guitar Center right now. Marked down from $399 to $289. I'm thinking about buying this one.
Acoustic basses are good for practicing, of course, but you'll definitely need an amp if your playing with someone using an acoustic guitar...outside at a backyard barbecue, street corner busking, etc.
Maybe a Roland Micro Cube Bass RX. Great battery-powered amp...much louder than it looks.