Hi Jason,
Got to be said that Brands is probably the most flowing of the 'local' tracks. I love Silverstone GP as well but it doesn't come up that often and tends to be seriously pricey, and Silverstone national is a bit stop/start for my liking.
Finally, you'll hear few bad reports about Cadwell! More like a very twisty country lane than a big wide track, but challenging and loads to go at (and I've only been there once!).
The one guarantee is that you'll have more fun, and feel more comfortable, at any TD where there's a bunch of DSC members.
Cheers,
Ali