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?