@Swimpy,
Hi Aperson
You might like a bit of:
Mogwai
Godspeed You Black Emperor!
Explosions in the Sky
But they're a lot more guitar oriented but do the crescendo, tempo increasing thing. If I had to come up with a description of 65 Days I'd probably say they sound Explosions in the Sky meet Future Sound Of London.
I like 65 days 'Install A Beak In The Heart That Clucks Time In Arabic' too, but having listened to the track you posted I can see they have a formula of sorts.