Speakers with wide listening window

I am looking to upgrade my speakers (currently Paradigm Monitor 7 v3). My biggest complaint about the Paradigms is their thin optimal listening window. If I am out of a narrow corridor directly in front of them, or if I am listening more than 4 ft off the ground, the sound drastically depreciates. I realize that all of this is inherent to some degree in any 2-channel system, but I am generally active and moving around while listening to music (e.g. while cooking) so I'm really looking for a set of speakers that can fill a room (20x30x10) without needing to be too loud.

My budget is about 1500 (up to 2k, max) new or used. The rest of my (vinyl only) system is:

Clearaudio Virtuoso Cart
Marantz 15-TTs1
Onkyo A10 integrated amp

Thanks!