Best Used Speaker for Around $5000??

Any recommendations on speakers in the $4500-$6000 (used a'gon prices) if I upgrade my totem hawk speakers?? Keep in mind I have a fairly small room (16x10) and would want to stay with fairly efficient speakers due to Pass XA-30.5 is RATED for 30 watts but delivers WAY more than that. I don't want speakers that are too big and require a amp upgrade. The hawks are 6 Ohm and 86db

My system:

Pass Labs XA-30.5 amp
Pass Labs X0.2 preamp
Esoteric XO3-SE cd player
BPT 3.5 Ultra Sig. power conditioner
Totem Hawk speakers
AudioPath custom IC's and speaker cable
Shunyaa Python CX power cords