Only ever done Cadwell TD's but love it there. Great circuit for 400s, decent facilities and fairly central contrywise.
I was on track there a couple of weeks ago and would recomend it highly. Also good for camping over and fulfilling marks quest for beer and pies
Definately intend doing a few more TDs this year and it is always good to meet up with other from here in person rather than just in cyber world.
I am up for some track fun and excessive drinking if work permits - so was a final day/venue chosen?