about how much would that cost to do? and how would that mini hi-fi sony system be compared to it?

Hey guys, I currently have klipche pro-media 2.1's and I love them. but I also use my speakers to host parties and they just aren't loud enough. so I am looking for some new speakers and am open to any type of route. I don't know much about the subject, as why I am here asking for help, but I...