upgrade TT or speakers??

Hello. I'm going to start to give some serious thought to upgrading part of my stereo. I have a Bryston 3bst, Odyssey Tempest extreme pre, Rega Planar 2 TT with benz micro silver TT and Vandersteen 1C speakers. I'm not sure if the TT or speakers are holding me back the most. Should I go for the speakers and get a pair of Vandersteen 2ce Signatures or upgrade the turntable. If I upgrade the TT, it would be in the range of a VPI scout or Michell Gyrodec with the RB250 arm. Any thoughts on which is holding me back more/ which should I upgrade? Thanks for your input.