To clarify, it's very very very difficult to decide which speakers to buy and then to decide which speaker within a manufacturers product line to buy.
As far as spending more money, you don't need to spend a lot of money to get great sound from a speaker. There are plenty of speakers in the $10,000 range that are just as good as a $35,000 speaker. That's one of the challenges that makes buying speakers so difficult. There are so so many overpriced speakers and trying to avoid them is very very very difficult.
I hope that clarifies things