Large soundstage at 2 ft distance?


What I want essentially are bookshelf speakers with as large a sound stage as possible. The placement is from 2 ft away and 3ft apart. Amp is Boston Acoustic avr721 receiver. 120 watts per solid. Needs to be magnetically shielded as they will be close to my monitor.

Looking to stay under $500. Used preferred.

Cheers!
davidandrewway