As a general rule, those larger diameter (6mm-6.5mm) will have easy to work with components but drift a lot in wind. If that matters to you or taking long shots, drop down to 5mm or 4mm. I've shot multiple 5mm shafts, they are easy to work with components both with collars, half outs, and HIT's from many people to give you buget and material preferences. I have used podium archery half outs and collar, HIT's with Iron will collars, HIT's alone (brass and standard), and used the black eagle half outs and there are many other companies that provide options (Easton, Ethics, VPA). I like titanium for the strength and weight savings, but it comes at a price. You have enough options that you can find the weight you want. 4mm is great for wind drift and penetration, but the components can be more finnicky, although I've used the Easton titanium half outs and they have worked okay (use them currently on easton 4mm and BE x-impacts for experiments I'm running). There are some good new 5mm options.
Expensive New Stuff
Easton 5.0 (Match grade)
Victory HLR
More budget option for 5mm
BE Rampage-pretty economical for .001 straightness and a light weight shaft, even in 250
If you can cut your arrow to 28-28.5 and drop to 70lbs you will have more options for spines and can run lighter weights. Longer than that with 75lbs it's likely a 250 spine option.
Depending on what you choose you can easily run $350 a dozen for some of those things- New match grade Easton 5.0 or Victory HLR are $205 a dozen minimum and then some of the fancy components are another $100 easily + vanes.