Recommended speakers for Bryston B135

I recently purchased B135 integrated amp from Bryston & it is very high quality..My speakers,PSB Synchrony II seem to have trouble with the lower octive & bass weight..I may need to consider alternative speakers.I have a modest size room,budget of $3500 after I sell the Synchrony II's.
I was looking at Epos Elan 35/B&W 804 & Vandersteen