2K is a great budget to start off in hifi with speakers. Like you i listen to mostly rock/electronic. For your smaller/medium space I would go with a smaller floorstanding speaker.
- Monitor Audio Sliver 200/300 if you want to use all of that budget.
- However, you can save quite a deal of money if you find an older used model. I just setup a system for friend with a Monitor Audio RS6 (which I bought on craigslist for $400) and they just sound fantastic with an NAD stereo amp. I was actually shocked how good they sound for the money spent.