Cool Stuff Inc. has the Gale Force9 Space Station Battlemat on sale for $19.99 USD, this is an exceptional mat, great for trench run missions.
GF9 Station Mat on Sale
Exceptionally headache inducing. 
Exceptionally headache inducing.
Yeah I have all the GF9 mats and I will say that is the one I use least. It is crazy busy and visually noisy up close.
I played on one just once, and was amazed at how easily tokens on it just seemed to disappear.
Haha, good times...
On a side note, when I wrote exceptional, I mean to the quality of the material and the play surface.
I am patiently waiting for the GF9 Battlefield in a box set of Turbo Lasers, put those on this crazy map...