Lol, i know this thread is preeeety old, but when i first received my antec 1200 i tried to removed the 200mm. No luck though. I am pretty sure though any 200mm would fit. Also, the stock fan has a controller on it. Recently i have been messing around and adding fans. I have 2 120mm side fans on the window. I added the extra HDD fan. Now i am trying to mount a fan underneath my vid cards, right above the PSU. Only reason i am doing this is because i put both of my video cards on my motherboard in the x16x16 position. This causes the cards to sit right on top of each other. One card pulls all the heat and the differnce is almost 15+/- degrees C. Anyway, i am rambling on. If you have done anything since then, let me know.... I may just try to doubleup on the 200mm fan. It only require an extra long screw