I have
Win mod 70 crf 7mm-08
Win mod 70 PF 7prc
Win mod 70 PF 30-06
MRC 1999 300wm
MRC 1999 375 H&H
Rem 700 .223
Rem 700 6mm dasher
ARC Nulcleus 308
ARC Nucleus 6.5 creed
BH Origin 6mm dasher
ARC Coup De Grace 223
All of these except the 30-06 and 300wm were built by me, I did the chambering threading etc…
It depends on what you want it for. I like CRF for hunting rifles but it isn't needed for 99% of what I do. The ARC actions are a type of CRF. My favorites are the ARC actions for the cost and features, integral rail, integral recoil lug, DLC coating, swap able bolt heads, etc… <$1,200, and the MRC actions, 3.6", like a vault and smooth.
If I could only keep 1 it would probably be the MRC in 375 H&H.
Having said that you don't need custom, if you want it to be nice and super slick that's great, but that's a want not a need. My untrued REM 700 in 6mm dasher has shot 5 shot groups in the .2's with a green mountain barrel blank and a worked over factory trigger in an HS Precision stock.
Nothing against the BH Origin actions vs the ARC, I just like the ARC better and felt it was more for the same $$.