Have have three Criterion pre-fit barrels from Northland. In addition to being exceptionally accurate, they are all very nicely finished. Highly recommended!!!
Groups from my three barrels at 200 yards.Target, MTU, Lr. Palma.
I'm pretty sure you'll be happy with either. I've ordered 2 Shilen from NSS and am very happy with both. Both shoot under MOA. I'm not good enough of a shot and I don't reload right now to know exactly what they are capable of.