Look for weaknesses
The good stuff is so confusing, and especially so considering the speaker in your own home may be totally different sounding, so look for the weakness in the speaker. I know that "sounds" weird, but try to find something the speaker did not do very well, and then compare other speaker's poor performances.
Does the speaker sound "bright"? Many speakers that have metal domed will have what is described as a bright, or forward sound. Soft domed (silk or synthetic) tweeters can described as being mellow or soft sounding. These "traits" are considered weaknesses by people that dislike one speaker over another. So look for the weakness, and determine if that is a sound that you desire.
There are many issues to evaluate.
An example: my Polk LSi's were reviewed with having a poor off axis (vertical) sound dispersion. I discovered the same problem as the reviewer with the LSi 9's mounted on stands. When seated, the sound stage is wonderful, over a fairly broad left to right sitting seating arrangement, but as I stand up (I am only 6') the tweeter output quickly disappears. Pretty noticeable problem. I own the speakers. I wasn't planning on using them in a party room, rather they are in a small HT were I will always be seated.
I had auditioned other speakers from other Polk lines, but did not find the same problem, only with the LSi's.
I have auditioned many other brands of speakers over the years. Something I have looked at is the "fit and finish" of the product. Personally, I hate any speaker that uses vinyl laminate, so many speakers on the market will not find their way into my listening room. So after eliminating some speakers based upon designs alone, grab the speaker and give it a lift. Heavy speaker magnets, wall construction and internal bracing will be quickly felt. Secondly, flip the speaker over. Is the bottom finished in the same manner as the visable portions? Third, check the seam where the front baffle wall meets the side wall AND where the side wall meets the rear wall for misaligned veneer or hardwood joints. Good construction is a sign that somebody cares about their product.
All in all, look for weaknesses, rather than absolute strengths.