Like others have said, get your setup dialed-in to play the room best, then do room treatment on all first reflection points, then bass traps in the corners if needed. Spend your money where it gives the most benefit.
Good Used Speakers ($8K-10K) For A Little Listening Room
I know that this is a tough one, because speakers are so subjective. My dedicated 2 channel listening room is only 10ft x 10ft. I listen to mostly jazz and rock. I currently use a Plinius SA100 Mk III (recapped and upgraded) driving Joseph Audio RM25XL's. I'm thinking of upgrading and was wondering what speakers would be a good upgrade for a small listening room. I like the Joseph Audio sound, but want more. I was thinking of Pulsars or maybe Perspectives. First, is my room too small for floor standing speakers? Second, what other speakers in the $8-10K range used would be a good fit in a small room?