I'll throw in my 2 cents, mind you I don't think there is any right or wrong with most of the high end custom stuff you're speaking of, just a matter of personal preference.
First concerning the action, I don't know that I'd go with a TI action if I was considering a bigger magnum caliber. It's gonna cost you more, you're only going to save 9 ounces or so (it's still a chromoly bolt) and they don't headspace as consistently like their chromo actions.
If you get a chromo Lone Peak, Impact, Big Horn then you can just order up a shouldered prefit from any number of guys, screw it on and go. I personally run impacts but Mike and Brian at Lone Peak are awesome guys and great shooters. Eric Andersen at Blue Mountain Precision does my gunsmithing but he works a ton with the guys at Lone Peak and he can turn you up a barrel without ever having to touch your action. Not the case if you go with a TI action. Not a deal breaker just something to consider.
As far as triggers, I started running Jewels, went to Bix n Andy, then Trigger Tech and now I'm back to Jewel's in my match rifle. Just a personal preference thing. I still have a Trigger Tech Diamond and I put a Trigger Tech Primary in the hunting rifle I just put together. I still prefer the Jewel's break when adjusted properly and I haven't had a single issue with them.
Like I said, they're all good, just preference. There's guys killing stuff and winning matches with all of it.
Here's the hunting rifle I just put together.
Impact Action with mag bolt face
Proof Carbon 8 twist at 24"
TBAC Ultra 7
Trigger Tech Primary
Leupold Mark 5 3-18
Badger Rings
This stock I won at a match, the actual stock is almost done. It'll be a Manners EH1 in Arctic Camo (gonna rattle can the suppressor to match)
Went with a 6.5 PRC
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