You need to go out there and audition all the expensive speakers.
The Infinity P363 may not look as sexy as the other expensive speakers, but they perform as well as many of them.
I think most of us believe that good-sounding speakers will measure very well both on-axis and off-axis.
If you look at the Stereophile measurement of the P360s, you will see that the they measure very well both on-axis and off-axis. In fact, the Infinity P360s' off-axis measurement looks even BETTER than the B&W 802D!!!
Of course, realizing how much the B&W 802Ds cost and how good they look and how well they are built will make you hear things differently.
The P363 goes down to 38Hz cleanly in most rooms, and the midrange and treble sound clear and smooth to my ears, even after I've auditioned the B&W 800D, Revel Salon 2, Linkwitz Orion, Dali Euphonia MS5, Martin Logan Vantage, & RBH T3R/P.
I'm not saying they are equals
. Not at all. For one thing, some of these speakers have more bass. But I'm saying you would have to spend a lot more money than $1K to guarantee better sounding speakers than the P363.
I recently auditioned the $2K PSB Imagine T towers at a local dealer. They sounded pretty good, but IMO they don't sound any better than the P362.
Of course, there are other factors to consider, like aesthetics, prestige, wife-acceptable-factor, etc.
That is just my opinion.