I have Time Atac Aliums, and along with a billion other people I reckon they’re pretty good.
Especially with mountain bike shoes if you want to walk around a bit.
http://fixed.org.au/forums/index.php/topic,8222.0.html
http://fixed.org.au/forums/index.php/topic,10196.0.html
http://fixed.org.au/forums/index.php/topic,2706.0.html
http://fixed.org.au/forums/index.php/topic,1386.0.html
One slightly funny thing about them - when they’re brand new, they’re actually slightly easier to pop out of, because of the lever-type action. Once the brass cleats have worn down a bit, it takes a bit more of a twist to get them out, but that’s a good thing for fixed. Then once they get really old they start popping out more easily again, but that takes years really.
Then there’s the option for a 13 or 17 degree clipout angle, depending on which way around you install the cleats. 17 is better if you tend to throw your legs around a bit when skidding, otherwise 13 is fine. I have a pair of shoes each way, depending.
So yeah that’s a recommendation for you.