Is this rude?

I'm looking to buy the best speakers I can, used, for around $2000. I'm looking at JM Lab Electra 906 or 926, Joseph Audio Rm7si mkII's, and possibly Sonus Faber if I can find a great deal. The only way for me to hear these speakers is to go into high end audio stores and essentially pretend to be interested, already knowing that I won't be buying from them. Is that rude? I just don't see any other way to make an educated decision...

Also, does anyone have any reccomendations as to other brands to check out? I'd prefer floorstanders (the room is about 17 x 13), but I'd be willing to consider large monitors as well.

Thanks!