One piece bases and one piece rings like Sphur almost certainly are more “true” but come with their own sets of problems on a bolt gun. Here’s my take.
I like to see what’s going on in the chamber without upsetting the rifle or my position. One-piecers tend to make you upset one or both of those.
Often, I also like to load rounds one at a time. Loading mags is a drag when you shoot 200-500 rounds a day shooting prairie dogs. Not seeing the chamber easily can make this more difficult (see above).
So, if your gun doesn’t have mags, like a BDL Remington and you might single load, if I were you I’d go to Murphyprecision.com and get a two piece base. He’ll custom make them for the same price if you doesn’t see them on his site. Stainless (black or raw) or titanium.
Then, buy Burris XTR Signature rings. The poly inserts should absorb the inherent small misalignment in the two-piece system, plus they allow you to dial in whatever MOA you want and they don’t scratch your scope. If your so inclined, you can even fiddle to get the scope exactly aligned in its optical center for your zero. I’m too lazy for that.
One final thought: one piece setups are going to be heavier than two piece. I don’t care, as heavier is better for me, but if you’re an ounce counter…