Look if your worried about the controllers then you should just spend the extra $60 and get the 85As, more reliable and tested. The 30As will work, are 1/2 the price and should be fine with your setup but your essentially pushing them to their limits. Which is fine (I do it all the time) but you shouldn't be too pissed off if you burn one out. Has anyone in the UK burnt out a 85A yet?

Steve