John James needles are the best needles I've used. I don't know what they do differently in making them but they rarely break and are ridiculously smooth to sew with.
I think the rest is all up to you and what you want to achieve. If you want a nice tight look with full stitches, go with a close spacing and a thick thread, if you want a gappy look to your piece, go with a wider spacing, bigger hole, and thinner thread. A lot of it is just aesthetics and most times, a saddle stitch will hold the work together just fine no matter the spacing given you are using a good thread of adequate size.
I have the Chinese pricking irons and the Chinese knockoff tiger thread and they are working just fine. I'm not trying to pass off any of my work as ultra premium. Vergez Blanchard has really good tools but you pay for them. It all depends on your level and what you are willing to put into it as well. Me, I'm waiting until my skill can catch up to meet the quality of the tools.
I know this doesn't answer you directly but it isn't really a simple question to answer since taste goes into it.