Any of those you posted would be fine. A friend of mine has one of the Bikesdirect Single speeds (not fixed) and he loves it. I gave it a once over, checked spoke tension, and tuned it up for him and was impressed with the value for money.

Another option is Masi: http://www.masibikes.com/bikes/fixed...-uno-drop-2013
http://www.masibikes.com/bikes/fixed...uno-riser-2013

Republic starts to veer into hipster territory, but some like that look, and the bikes are configurable to your liking: http://www.republicbike.com/?gclid=C...FYw-Mgodxy8AHw