I don’t think you necessarily made a mistake and I really doubt you’ll regret buying them after listening to them (after a good amount of break-in of course). As others have said, Dr. Hsu knows what he’s doing. I think especially if these were for home theater they could be an outstanding value given their dispersion characteristics, and being able to position the speaker horizontally as a center speaker is also really nice.
That said, if they’re only for stereo there are other speakers in that price range that would have me second guessing a little. Specifically, the Wharfedale 11.2 or 11.3 (see Crutchfield) get nice reviews as does the excellent Silverline Minuet Supreme Plus just to name a few. All of these are in the same price range and, at least IMHO, are better looking speakers if that at all matters. But for sound quality in particular these speakers — especially the Silverlines — would be very stiff competition. Not trying to be a d*ck here, but since you mentioned the Hsus are returnable I just wanted to mention some viable alternatives in case they also may offer something attractive to you and to help potentially avoid the dreaded buyer’s remorse. I will say that if off-axis listening is a priority the Hsus may well be the best choice of the three. Best of luck.