As an engineer I've purchased many speakers and helped many clients purchase speakers.
step 1. What are you looking for ? Size. Sound. Etc.
A budget number is a terrible idea as your basis. There are $15,000 speakers that better 60,000 speakers yet only when you know what you're looking for
step 2. Synergy is more important than any one speaker or amp etc.
step 3. Buy something you think you can use forever. It will likely not happen that way but it's your goal.