It reads as though you have LS50s in your home but you auditioned 805D3s in Best Buy’s highly treated room. If that’s the case, you really can’t draw any useful conclusions as to which performs better regarding imaging and soundstage. Unfortunately, you need to hear both in the same setup, same wall distances etc, to make that assessment.
The LS50s should provide pinpoint-imaging that competes with some of the best, though they can’t accomplish the same sense of scale (soundstage size and spatial cues derived from deep bass) as a larger speaker. Though, in an untreated room, with speakers <2’ from the walls, or similarly compromised placement, you’re not going to hear LS50s (or 95% of speakers out there) at their best.
The LS50s should provide pinpoint-imaging that competes with some of the best, though they can’t accomplish the same sense of scale (soundstage size and spatial cues derived from deep bass) as a larger speaker. Though, in an untreated room, with speakers <2’ from the walls, or similarly compromised placement, you’re not going to hear LS50s (or 95% of speakers out there) at their best.