You have to establish some goals before you can really answer your own question for what is good for you.
There are two different kinds of synthetics, the plastic stocks and the injected fiberglass stocks. The injected fiberglass stocks (H & S, McMillen, etc) are way better than the straight plastic stocks in as far as accuracy goes.
It can be a Sack of Heck trying to accurize a rifle with a plastic stock. Accuracy is a relative thing, to some guys, an accurate rifle is a rifle that shoots a 2" group at 100 yards. To other guys, they are wanting to shoot 1/2" groups all day long. Sporters Vs. Heavy barreled Varmint rifles in Plastic stocks are another whole can of worms with the Varmint versions seeming to be much more accurate than their sporter counter parts, especially the Savage rifles.
If you want an extremely accurate rifle, then the Laminate stocks or the fiberglass stocks will give you the best service.
If you are really wanting to be rough on your equipment, want extreme accuracy, then the Laminate stock is tough enough to run over with your truck. A laminate stock can really be abused like no other stock...no kidding!
When friends and family bring me a rifle that they want me to accurize with a plastic stock, I tell them that the first thing that I want to do is to buy a Boyd's laminate, have Boyd's put the pillars in it. Then I'll free float the barrel and bed the action. then I can get 1/2" groups out of the rifle with hand loads. They bring it to me because they are wanting an accurate rifle.
The reason that I get them to order the Boyd's stocks is they are cheaper than the H & S stocks or the McMillen stocks, and they are tough enough to be dropped out of a tree with no problem to the stock.
I have had a whale of a time with the Rem 700 Plastic stocks and the Savage Plastic stock in the Sporter versions trying to get them to be accurate with cartridges from 270, 30/06, and 7 Mag. I have reinforced the forearms with 1/4" steel rods, bedded the forearms with every kind of epoxy that you can name, along with bedding the actions with really spotty results. The truth is that the stocks are just too flimsy and whippy under the recoil of these heavy kickers. I have had good luck with the plastic stock 223's, and no luck at all with the plastic stock 22/250's and 243's.
You mentioned barrels, the stainless in the Rem 700, Brownings, Savage, and Sako are machined much smoother than the same versions of chrome moly which means less copper fouling which means easier cleanings which means less money spent on cleaning components.
Also, if a guy is not prone to take care of his equipment, the stainless will take the elements much better than the Blued counter parts.
This is just a hobby and we are really talking about whether you like Fords or Chevy's...you have got to figure out what you like within your budget constraints.
Good luck!