I'm waitng for my CR4 to arrive as well.

The first strings going on will be Corelli 370TXs. I've played the LaBellas on my UB before. They are a great string to play, soft under the fingers and a bit thicker than the average steel. They have a sound which is quite lively and clear, at least on my laminate UB. They have been talked about in the same sentence as gut, but that's not what these strings are about at all. They could be good for the NS. I've thought about trying them later. The ones I had before are gone now tho. The 370s are a different animal also. It might depend how much mag v piezo in your blend. With the CR4 that's not an option of course. Good luck.
gomez