For tripods & heads, it's like pretty much anything else: the more you pay, generally the better you get. Really Right Stuff is going to be the top of the heap, but they are also on the expensive side. If you want to save some money, Two Vets might be a good option for you for the tripod legs. I wouldn't mess with the cheap +/-$200 legs. I've got the Two Vets Ruck, and it's a good enough tripod for glassing, but it's a big compromise for shooting.
I wouldn't compromise on the head, especially if you are going to shoot from it. I definitely haven't owned/used every head out there, but I've used some cheapo's and I currently have a cheap 28mm sunwayfoto ballhead, a 30mm RRS BH-30, a 50mm Feisol CB-50D, and an Anvil30. The anvil is far and away superior to anything else for shooting. I also like the Anvil for using binos. The Anvil is a compromise for spotter use, but useable.
For me, the RRS 2 Series, 4 Section tripod with integrated Anvil30 is the jack of all trades shooting/hunting set-up. Yeah, it's not super-mega-ultra-light, but it's not a big deal to pack. At least not "out west" where I hunt.
As far as attachments go, there's a ton of ARCA plates that you can attach to your spotter and/or camera. I'd stay away from the cheap-o chinese plates, and pay the few extra dollars from a reputable company that is manufacturing to the RRS "spec". For Bino's I really like the RRS bino cinch, but there are other options out there too.
For your rifles, install an arca plate at the balance point. For most hunting rifles, this is going to be right in from of your BDL/DBM - don't attach to the very end of your stock. It's easy to install a couple T-nuts into the rifle fore-end and then attach the arca plate. Use a drill press or a hand drill. I'd go with Area 419 or Henderson, maybe the new RRS Arca rail when it's released. For my hunting rifles, I like the smaller +/-4" rails, and I wouldn't want anything shorter. For my other rifles, I like a full length arca rail.
You only need a a few hand tools to install the rail yourself
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Pull your stock and mark hole locations
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Drill bottom of stock for screws (also serve as pilot holes for next step)
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Flip stock and use 3/4" paddle bit to drill for tee-nuts (forgot to take a picture, haha)
Reassemble rifle and you're good to go
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