Have had experience with FPS, owner Troy has a lot of experience dealing with Aussies, I imported my stroker kit form him and quite a few other parts, out of your list they probably wouldn't be my first choice but they are easy to deal with and like I mentioned before he has no qualms about dealing with Aussies. Keith Kraft has some killer options & Roush Racing has the dollars an R&D behind it and you pay for it.
I wouldnt be afraid of any of them. Compare each ones engine to the other to see what your getting for your buck. Its the little things that make the power. valves,springs,guides,bearings,piston material, remanufactured parts or new etc etc.