Oh god, are we on round 11 already? I think I missed one.

Unquiet dead
The Unicorn and The Wasp
Tooth and Claw

I'd rather have been wrong about Boom Town

I think different settings can work depending on the storyline, and more importantly, on the nature of the threat. I definitely think Daleks work best in an enclosed setting for example, but the Master wouldn't particularly benefit from it.

Round 5:
39) The End Of Time (episode 1)
Round 6:
40) The End Of Time (episode 2)

New:
23) Last Of The Timelords- I really like Martha's story in this, and the guy she should have married was great too. Sadly the magic flying Doctor ending really detracted from the episode though- and didn't think much of the cgi version beforehand either. Was debating between voting for this or a few others, but I remember feeling very disappointed by the plot resolution in this one.