price points vs. room treatment

does it make sense for me to spend 4k on speakers?:

is it reasonable to say that the differences between a wonderful pair of $2000-$4000 bookshelf speakers (e.g. ref 3a de capo, opera callas, sonus faber concerto, etc) and a fairly good pair of $700-$1500 speakers (e.g. devore fidility gibbon 7.1, soliloquy 5.0, von schweikert vr-1s, etc) would be rendered irrelevent in an acoustically untreated room? and, is it reasonable to say that no matter how wonderful a pair of speakers might sound in the store there is a very likely possibility that these same speakers will not sound as good in your untreated living room?