Yeah, you're in a tough spot, but a good one to be in since you've broken it down to 3 basic styles. Shame you can't get to a music store that carries any of the three. Sometimes just holding a bass will tell you much about its fit (for you). You may be able to rule out one or two if you find the fit a bit off. Thats without even playing it. Of course, when you play it, you'll know for sure. Hmmm....
I agree though about Specter and Warwick, subtle choice there, especially Streamers, of course. And the Ibanez basses are similarly shaped too, but can sound totally different.
You could let circumstance/luck decide for you. Keep your eye out for any of the three, and the first one that presents itself to you, grab it! Call it fate or whim of the gods or whatever. Kinda how I stumbled upon mine. Felt like Conan finding his sword in the cave, heh heh.
Maybe that doesn't help, but I do understand your situation. I've been in the same one. A bass is a very personal thing, and having the 'right' one is important to the enjoyment of playing it, which is kinda the point, right?
Good luck man!
