If you have not bought the parts you listed already, I would ship the rifle to Randy at CPC and have him do the complete package (receiver work, barrel work, bolt work and trigger job. He does fantastic work.
If you’re going full custom, Fedderson has great barrels at a feasible cost, Kidd bolt, Kidd or Fedderson receiver, BC trigger or a Kidd trigger (or Kidd trigger kit).
Accuracy/ grouping is going to be barrel first, trigger and then bolt.