I don't have much input other than telling you that I love my FT03B. It doesn't have the best ventilation but I don't have any issues with OC'ing with an H80 (I'm at 4.8GHz with no issues and have gone higher) and for a while I even had a 580GTX in here.
You should be fine.
edit: I totally didn't know there was a Mini version of the FT03 lol. I guess I missed that part in the thread title. Just checked it out, looks awesome. I wish I could fit my mATX board in there.