I think I would try and get a RH-96. They are very pricey but would make your instal much easier.
If you have to go on the dash, I think the center looks better, assuming you can run the wires so that they aren't an eye sore.
Of course the obvious comments about safety still apply, but it really sucks that many / most modern vehicles have absolutely no room to safely mount scanners / radios.
If it was me driving I would prefer it on the center of the dash if those are the only 2 options. What about on either side of the center console, either by your leg or the passenger leg facing up?
nice pro look antenna-I say centermount dash for radio-and that new car of yours looks to be very cool too