Regular Dies are fine. Small base is not needed unless you KNOW it is small chamber (ie: you made it that way).
Get a Redding or Forster 2-die FL Sizer set. Forster's sizing button is better, but Redding has carbide floating buttons available. If you want best accuracy, get one or the other's Benchrest seaters...they are legitimately better on target.
If a little cheaper is in mind, then go with Hornady New Dimension, which are by all accounts great dies for the money.
Even with plinking ammo, I don't think any other dies are in contention for my money except $$$ customs.
ETA: Crimps are unnecessary unless...well, I don't know what. If you are running 0.003"-0.004" neck tension like most FL dies will produce, in the AR, it just doesn't move the dern bullet around in recoil. Mayyyybe if I were going to full-auto...