Sorry I did not pipe up earlier, I was out of town for a series of meetings with a vendor.
Here's my philosophy on the subject of sound from an EUB: The best any EUB could hope to achieve would be to sound like a double bass with a pickup on it. Since the NS basses are tightly constructed and are solid-body instruments, their habits lean towards a more electric sounding bass (more sustain, more string detail, that sort of thing.) The stock strings (NS Electric "Contemporary") don't help; they're fairly un-upright-like in my opinion. In my experience, using strings which pull it towards a more URB-oriented sound (less sustain, a more blunt attack to notes, almost a gut-string-like vibe) will effectively counter-balance the electric nature of the bass.
So if you're going for an "authentic" DB sound, changing strings helps a LOT, and with pizz, so does playing it like a "real" bass (no wimpy fingertip plucking - you gotta dig in to get the strings to "bloom.")
As for the instrument lineup, I will make one correction to the lineup as posted - the CR model is (currently, anyway) further divided into a couple of models - they don't all have magnetic pickups. That bass that has been referenced is the CR-M model (M for "magnetic"). So here's the further breakdown:
WAV - Chinese-made "budget" model, lower-cost/quality stand, case - passive, no preamp (No longer made)
NXT - Improved version of WAV, better construction (made in Czech Republic), better woods
CR - Made in C.R., Active preamp, higher grade wood and construction, better stand and bag, finish options
CR-T - "Traditional" model - endpin stand, "thumb position" marker, engineered to be more arco-friendly
CR-M - "Magnetic" adds EMG "dot" pickups, two-channel blending preamp to CR
EU - "Euro" model - extremely high end, very expensive, usually made to order
Now, the CR model (polar pickup only, no magnetics) has been effectively phased out of the lineup quite recently (last month) by NS Design. As a result, I have a handful of the very few basses that were left, and they're now marked down quite considerably. Basically, you can think of the CR bass as an NXT with all of the "essential" upgrades already done for you. It has a better bag, the high-end heavy-duty tripod, a built-in active preamp, a polar blend knob (not switch) and notably better construction/fit and finish/wood choices. So... there's that option.