I know you want to customize it and all, but you just perfectly described a Browning X Bolt Pro:
Stainless: check.
Fluted barrel: check.
Coated: check.
Synthetic stock: check (and a very good one at that).
Bedded / free floated: check.
22 inch barrel (in 308 and 30-06): check.
Detachable mag: check.
Threaded: check.
7.5-8lbs with optic: very easily. Probably even less if you go with a good Leupold.
You can replace the stock and trigger if you want to, but the ones that come with it will work fine. Buy one, slap a decent scope on it, throw it in your truck / on your handle bars and start dropping critters. No farting around, just a perfectly usable firearm.
Oh, and the barrel is factory lapped, that wasn’t on your list but it’s a good bonus. Also, it will hold its value in case you one day decide you want to try something else.
I have 2 x bolts for myself and one for my wife, they will never be sold, just used to flatten critters.