Need help with stereo

I have an Illusion X tower. I really want to get four Chrome speakers for it. Don't know much about stereo's and could use some help. Not looking for the greatest sounding speakers of all time. We only Surf behind the boat so it doesn't need to be super loud. Just wanna be able to hear it going across the lake or while Surfing. Looking for the cheapest route to get nice looking speakers. Would be willing to go used but haven't had much look finding anything. Thanks in advance for any help.

I've seen the Titans in all chrome at a Malibu dealer. They looked good, however they were right beside another boat with black and chome Titans that I think looked better. I never would have thought that before seeing them side by side. They are black but the front bezel and the rear bezel were chrome. Looked sharp.

I don't know that I would call them cheap though.