They are good parts. If you search the forum you’ll find plenty of info about the strength of the Nimbus hub, and the quality of the Nimbus rim (same as the '05 KH rim). I don’t know if it’s a handbuilt wheel, or if it was machine built. Machine built wheels generally need a bit of work to get maximum strength, but the parts are good.
There is a thread in the reviews section about he Nimbus Ventures. The common opinion seems to be that they are solid cranks, lighter than Moments but not as strong.
What kind of frame are you putting this stuff in? Does it have bearing holders that will fit 42mm bearings?