Max overclock with these two radiators for an FX-8350

I am curious what you think would be the best overclock I could get with these rads on an ASUS Crosshair V Formula -Z with an FX-8350. Keep in mind I will have one or two 770's in this loop.

http://www.alphacool.com/product_info.php/info/p1209_Alphacool-NexXxoS-UT60-Full-Copper-360mm---White-Special-Edition.html

http://www.alphacool.com/product_info.php/info/p1206_Alphacool-NexXxoS-Monsta-360---White-Special-Edition-.html

Also, what overclock could I get if I had just the bottom or just the top one?