ARC M10 rings. They are the most elegant, engineered rings out there. Mounting is super simple and they are high quality.
Spuhr's are undoubtedly nice, but spending $400 on rings is not a necessity. Where Spuhr's make sense is if you want to mount a bunch of gadgets, such as devices for NV shooting, their rings have lots of mounting options. But beyond that, I personally think it's hard to justify the price for those rings when there is plenty of equal quality products at a lesser price point.