I auditioned both speakers in Hong Kong during business travel. Both speakers are great. very airy, delicate highs and sweet mids. The differences are the bass extention, well, that's what I expected since NHT is a bookshelf and KEF is floor standing. Don't get me wrong, the bass is still way lower than most of the bookshelf in the comparable size and very punchy, it just didn't have the same "thickness" when listening to some jazz. I guess with the aid of subwoofer. It shouldn't be an issue. So I ordered NHT right away. The curvy, glossy piano black cabinet of NHT is just beautiful... and NHT Two C is much stronger center than KEF IQ2C.
The speakers finally arrived a week ago and I couldn't wait to hook it up with outlaw. I replace the center, L and R right away. The difference is instant surprising and I played "The house of flying daggers" on those babies. I can hear all the jiggling details and powerful drum beat during the "blind dancing" scene, which I haven't hooked up with subwoofer yet. That prompted me to hook up subwoofers right away and in return the whole house was shaking and my wife even came out of room to see what happened
During the weekend, I finally got my 5.1 setup completed and I'm very happy about the outcome. It's not only sounded good but also eye-pleasing which is very important to my wife. I think I'm going to enjoy this combination (Outlaw 1070, Classic Twox4, Two C and Ten) for quite some time.

As an avid fan of NHT for many, many years I believe you made a wise choice.

One question came up during the tweaking yesterday:
The 4 speakers are 6 ohm rated and center is 8 ohm, what impendence setting should I pick on the back of the 1070? If I pick 4 ohm, will that mean more current/watt to drive the speaker?

I'd probably leave the switch set to 8 ohms if it were me. This also matches advise from the Outlaw Model 1050 manual, which recommended the 8 ohm position for speakers rated at 6 ohms or higher.

I'm putting together a home theater and have hooked my B&W CDM-7NTs up in front and they're great with the 1070. The rest are old, but good speakers I had around and eventually will replace, ADC 303AXs for surrounds and a KLH 17 for center. Not great but it got me going. Likely will try to find a B&W center used.

I, too, suggest you listen to the B&Ws.