PS Audio PWT next step in performance?

Hi all!
I am using a PS Audio PWT running to my Aesthetix Pandora Signature DAC via a Kubala Sosna Elation balanced digital cable. What transports have been used with more success with this dac or in a similar setup? I know that this transport is somewhat of a giant killer but how much odd I have to spend to get a significant upgrade?
Best Regards to All !
bill