FocusedFX
Sorry for the late post, just read your query. Dunno if you already got a cart, but... here goes:
The medium compliance ZYX R-100-02 is a good possibility, and not out of your budget range. There's a Absolute Sound review of it somewhere on the Sibatech (distributor) website (www.sibatech.co.jp), and elsewhere on the web. Probably the ZYX Yatra also, for a bit more money.
I had a MC Alpha Genesis 1000 (pedecessor to the ZYX R-100) on an original WTT 15 years ago. While I ultimately didn't care for the WTT (with its sand-filled arm, clear platter, untweaked, the sound was too etched and had no foundation) I never felt the cart was the weak link (and, shifting to a Merrill-modified AR ES1 with a Sumiko MMTi, certainly confirmed it).
I'm sure your late model WTT is a vast improvement over the original. The only caveat is (and this is only a wild-assed guess), your carbon fiber arm may combine with a ZYX to give a sound too lacking in PRaT for you. Chacun a son gout.
Lastly, one of the the Denons (the DL-304, I believe) is relatively inexpensive, is a high compliance cart, and may, repeat, may, be appropriate for the Well-Tempered's mass. It certainly should not put much energy back into the arm.
Robert