This is too difficult a question. There is such a wide range of stuff available and different people want different levels of quality, different features, etc. I'd give it a try if you asked about one thing at a time - racks, panniers, tent, sleeping bag, cooking gear, clothes, tools, etc. If you do some searching on each of these you'll probably find some discussions on this forum.

My personal taste is to buy good quality stuff. It's nice to have good stuff, and it will last for years. It might be expensive up front, but you can take the same stuff touring for the next 15-20 years if you want.