The lease expensive and most trouble free way for you to do this is to go out and listen to some speakers and then make a decision based on what you thought was best. If you choose a different path, the chance of making a mistake is very high. I would say at least 75% to 80%.
Obviously, listening around is important -- and fun. But I think the confidence this should give one in a purchase is overrated -- unless one can audition in home with the kit you plan to use.
For my last three serious speakers purchases, I bought two pairs unheard, and one after a couple of careful listenings. The two unheard speakers lasted 5 yrs and approaching 2 years (and counting) in my system, the auditioned ones two weeks.
My preference is to listen, of course, but I'd personally not be too anxious about buying a well researched unheard of pair of used speakers at a good price. Also, many internet dealers and manufacturers offer generous home trails, so next to no risk if you go that way.
John