I have handled a rifle built on a Surgeon action and thought it very slick. I own/have owned rifles built on PGW, Defiance, RPA, Barnard and Stiller as well as the Rem 700 accurized and out-of-the-box and would say of the customs' the smoothest feeling are Barnard, PGW, RPA, Defiance and Stiller with their being little to choose from amongst the first four. I had an issue with my Stiller that may have been a unique or' one-off' problem but I lost confidence from that point onwards with Stiller's products whereas I would have no hestitation in buying any one of the others again. My short examination of the Surgeon impressed me so, unless I heard much to dissade me, I'd consider them in any new build. So much depends, I guess, on your intended application and, as Rick of ATRS says, your stock choice etc.
Good luck whichever route you choose - I look forward to seeing a review of the finished product.
Good luck whichever route you choose - I look forward to seeing a review of the finished product.