I have two Stillers (one I still have yet to fire). I have no complaints except the Sako extractor isn't my favorite. I do like them more than the Rem 700 though.
I also have a fully trued 700 with a PTG bolt & side bolt release. It work but it is NOT as smooth as my Stiller & has WAY more rounds put through it.
A good friend of mine just contracted my help on his first custom rig, I thing i've found the best action on the market as of now:
As far as barrels go, the older Shilens I have shoot very well, but I have heard rumor their accuracy is going down hill. I don't know how accurate that statement is.
I've ran Shilen (3x), Krieger (1x) & Obermeyer (2x) thus far & all are treating/have treated me quite well.
Stick with the top tier barrel makers & you won't/can't go wrong.
I have two Manners T-5 stocks & a McMillan A-5. I'll take the Mcmillan all day long, just something about the McMillan that feels better to me. Quality wise, I don't think you'll find a difference.