Re: Can on-wall speakers perform as well as floorstanders?
YES. In my reference system, my Meridian in-walls (review coming soon in AVRev.com) have bested a number of top notch floor-standing speakers with ease. Not to mention they image like champs and take up zero space in my living room/reference room. I'm a huge supporter of in-walls/on-walls. All of my systems are or will be in or on-wall systems soon.
Check out Paradigm, Definitive Technology, RBH, Aperion, PSB and Meridian if you're serious about in-walls. For on-walls I love Gallo and Morel.