Budget system for Rock and dance Music?

Hi there guys as much as I love my Luxman/harbeth combo for jazz and strings and vocals, sometimes I feel iam missing the dynamics i love from Rock music and some techno why not when I am in the mood to work out or feeling good evening.

Instead of starting all over I might can put together a second system in budget where I can spin this kind of music from Metallica, Iron Maiden etc, plus techno.

I am music lover as far as it can seems Ella F from DJ Tiesto,
its all about the music and the mood for the moment,
highly appreciated!

budget 1500 for amp and speakers,

regards and Buon Weekend!