I have personally owned many, many M-305, M-14s, Poly and M1A rifles. I currently have 11 in the locker...... See my EE add for verification!
I have personally used several different stocks and Chassis;
The Chinese wood and plastic. Italian Walnut, Boyd's Walnut. USGI Wood and fiberglass. McMillan Fiberglass/composite. Archangel, Troy MCS and the Black Feather Chassis. Professionally, I've had a Sage and a JAE across the bench as well.
I still have the Black Feather in my stable. If I ever come across a Sage (when I also have the cash) I will pick one up. I don't think I would sell the BLack Feather to get into a sage.
In my very humble opinion, for my own uses; I prefer the USGI Fiberglass stocks for "daily use"; my "if you could only have one" choice. The weight, balance and durability are "aces". You can reinforce the stocks to make them a bit beefier. But IMHO not enough to be worth the effort. John Wolf in the US is doing some very interesting things with USGI fiberglass stocks, adding aluminum etc. I would give my left nut (if I can convince my wife to let me have it back) to play with one to see what the fuss is about! My second choice is a Boyd's Walnut.
The McMillan stocks. Well, there's a reason they are the gold standard. At $800 USD it's a bit spendy! But they take bedding like nobody's business. Never falter, never fail. They are monsters! They cost a lot, but do everything they are supposed to and nothing they aren't. The only real downside is the weight.... Those suckers seem to weigh a ton after a 10 round string of fire off-hand.
I prefer the JAE for quality over the Archangel but the Archangel wins on value for the buck, but I won't spend my own $$ on another one. The ergonomics of them is pretty darn good.
The blackfeather beats the Troy, on price and tune-ability (again in my opinion, YMMV). But the Troy looks way more "bad azz" than the BF.
The USGI wood stock is easily as good as a Boyd's, they seem to fetch more $$ used than the Boyd's does new, so I'm not a "believer" in USGI wood. Don't get me wrong, the USGI wood stock at $125 is a winner. At $225 it costs more than a new Boyd's does landed at my door.... That and old wood warps, so you never know if the stock is a winner till you get it. There is always a place for a "retro" build with a faux selector sw, and the USGI wood is the winner in that dept. The Italian Walnut stocks are BEAUTIFUL.... A bit too pretty for me..... I like to use my rifles, not hang them on the wall and stare at them. The Italian Walnuts I have seen are a touch "softer" than the Boyd's walnut seems to be, so they seem to mark-up and dent a bit easier.... The Italian, Boyd's or USGI wood stocks are all suitable for bedding (if that is a goal). I believe it's something to keep in mind when re-stocking.
The Chinese stocks are not stocks I hesitate to take off and toss or sell. The best thing about them is that you can take the stock metal out/off and put it in any wood stock! The Boyd's (for instance) are quite reasonably priced with-out stock liner or butt plate.
Be realistic and honest with yourself before spending hundreds or thousands on a stock or chassis!
All that said..... I would really like someone to make an aluminum copy of a USGI Fiberglass stock..... Something a fella could epoxy bed. No fancy tensioning screws and an adjustable cheek rest.....
John