I purchased a lot of adjuncts from RA when upgrading my 25 year old carbine. When I built the SPR, I went with the RA Ultra-Match for two reasons. The second reason was that I am a big fan of Shilen barrels.

The primary reason was the previous dealings that I had with Rainier Arms. In my humble opinion, you will not find nicer, more professional, more knowledgeable people in the business. If they had everything I need, I would rarely shop elsewhere. Prices are very competitive, and delivery times are nothing short of amazing.

BTW, the SPR has an LRB lower from Rainier and a Timney 3LB trigger.

Any of your choices will make a very nice shooter.

Glass is second only to the trigger in importance for a distance rifle.