Which bookshelf speakers to buy?

I'm in the market for bookshelf speakers. This will be my first step into a "real" audio system. I will be using these for music/movies(60/40). Considering making it a 3.1 system.

I've narrowed my search down to...

Onix Reference 1 Monitor Loudspeaker: About $500

Tyler Taylo Reference Monitor: $1000

Usher S-520: $450

These will be paired with a Pioneer VSX-1018AH-K 7 Channel A/V Receiver. Haven't decided on a amp yet.

Any help would be great.

Thanks