Welcome to the forum and I hope you have good experiences here. There's certainly a wealth of knowledge on what you're asking. The answers to your question are simple : YES. NO. and MAYBE.
One of the surest paths to a disappointing upgrade is to not understand what you're trying to fix. If you don't have a specific goal then what will mostly likely happen is disappointment.
Before anyone can give you a credible answer, figuring out what you need to improve with your current system is in order. What don't you care for? What needs a boost, trimming down, or changing because of the way it sounds? How big is your room? What type of components drive your theater and what do you typically listen to?
At what volume levels?
Those kinds of things drive decisions. More data and more information and the opinions will fly