Can't comment on the fan mounting, mine are mounted right to the H70 radiator.. Don't remember seeing anything they could be bolted to with the hdd cage removed. Might be a mod in order there, hopefully someone else can add to that..
As for fan controller, I have this http://www.scythe-usa.com/product/acc/028/km01_detail.html
, reasonable price, works great. Looks alot better than the pictures there seem to show. Comes with temp sensors, and you can set target temps so it will turn on and off and adjust speed separatly on all four channels. Not sure if it would work well on the 1200's stock fans. I use mine just for the fans inside the case, two on the rad, one over the northbridge and one over the southbridge. It works great as an automatic controller once you figure out where you want the temp sensors and play with the target temps until you have the right balance of air and quiet.
I used to have this http://www.zalman.co.kr/Eng/product/Product_Read.asp?idx=209
but it's sitting on the shelf now. The display is rather ugly when its turned on, has temp sensors but no automatic speed control.
For strictly manual control, this has 6 channels instead of four http://www.cooltechpc.com/c/ctpc/std/sku=ZM-MFC1.html
, looks better then the other Zalman but might be a bit much for some. I haven't seen one personally but I'd give it a look anyways.