You can't just read reviews and buy products. Even if you have a hair twin here, you still can't do that. Every time you try a product you need to look at the ingredients. If a product makes your hair dry look at the ingredients...read up on them and try to think of which one could be the culprit. Any time you try something new you should be mentally keeping track of their differences and similarities. Don't go out and by the entire line of something. It's expensive and unnecessary.
My suggestion would actually be to go through your stash again, use things and try to figure out what your hair likes and doesn't like. For $2500 the least you should come away with is better knowledge of what your hair likes.