I would say first decide if status matters to you. The NR often sell and hold value better (people dont like the registry), but the restricted is how it was meant to be (way handier and a lot lighter). These are considerations you must make in addition to how the transport and use restrictions apply to both statuses.
The Kriss is one of the few sub gun platforms that offers a factory NR option, its only competition is from the BRS-99, and aftermarket converted Evo 3's, MPX's, and PS90's, and it is the only one of those 4 sub guns that utilizes pistol mags giving it the 10rd advantage.
If status and mag capacity are not an issue, the CZ Evo 3 is the best bang for your buck, I know I intend to get one.
If you do decide you want a NR Kriss, you can remove the barrel shroud and expose that noodle barrel, it saves about a pound of weight off the front of your rifle which makes a big difference.