RPM, Lone Star, Dura Blue all have some of the higher priced but nicer axles. You can save a little coin with G-force or Tusk axles. You get what you pay for. Same applies to your swing arm choice.
As far as the stainless bolt kits, the one posted is pretty decent. Most kits are about the same. Just make sure you understand what is/isn't included. Steer clear of using them for suspension pivot points and use anti seize when installing them the first time.