time to change tt's

Hi everyone, I am using a michell gyro se with an Origin Live Silver with the twl mod and a Transfiguration spirit cartridge.
The rest of the system consist of a Music Reference rm9 mkll and an audio research sp9 mklll mods by Great Northern Sound with Cardas interconnects and power cable. The speakers are Vandersteen 2ce's.
I would like to upgrade the source either by upgrading my current tt or purchasing another one. I am looking for suggestions as I have no experience with another tt.
Thanks
Richard