I doubt anyone will have experience with more than 1 of those so it's individual review.
The peak and quest are basically the twins within the family. The quest has the same carbon as the peak, just added adjustability, and sako doesn't half azz anything so the adjustments will be top notch for fit finish and function, looks great also, it's amazing carbon, like wood in feel, density and sound, not hollow, loud, cheap feeling, full sealed underneath the metal like as if it was carved from solid block of billet carbon. They do absorb recoil really well, warm in the hands. I have a tikka 308 set up slightly heavier than my peak 308 and between it's design and materials you notice it way more when you touch the trigger. It's kind of surprising really, same ammo, back to back, the sako is lighter and yet somehow doesn't beat on you like the tikka.
I can't imagine any of the other players have a carbon stock as good as these Sako's. Otherwise what's the difference between the peak and the quest besides the adjustable version of carbon stock? Coated stainless, that's it. Mine shot hornady 168 eldm white box match into .6" ctc for 3 and 180 gr fusion about the same...accuracy won't be a problem, can't say enough about the trigger, or the flush detach mag, not a single plastic piece to be found, it's carbon, stainless (including the sling swivel studs) or aluminum, cycles like butter, fastest lock speed in world, super short bolt throw (clearing modern scopes larger eyepieces with ease). Not sure what fits in the belly of 300wm but likely 1 more than most belly fed as my 308 holds 5+1.
I saw the gun/ammo article on your sako quest 300wm, most accurate 300wm they've run across in testing...hard to not look at it, I see why it's on your list. Do you want 90 degree semi custom and big magazines hanging down? or do you 'demand perfection' lol
on a side bar I have to laugh at the guys who put those 2 round shell holders just under the action on the side of the stock.....right where you hand goes when you grab it to go for a walk or pick it off the ground, guys need to think things through a bit better on that for a hunting rig lol, fine on a big heavy prs rig but not where your main grab point always is and that goes for hanging magazines also...bonus for the sako there on just that aspect alone imo, best magazine bottom end in the business, only flies on the 85's were the ejection angle issues on some....all gone with the 90, not a single fly on the 90...aside from potential reloaders seating things past saami etc. and wanting semi-custom type builds anyway, I don't know how much extra room is in the mag box of the Sako's for those reloading loonies
what are we missing, oh do the other guys have integral picatinny? machined low into the receiver to allow maximum ring height flexibilities? as you go through it feature by feature you'll see one of these rise to the top the others just can't match lol
Good luck, follow your gut, one of them will talk to you more than the others, think about resale, and other things. To me the sako is the do it right for the last time, that's why I have the one I have now. Scopes may come and go but not this little 308.