II can only think of one decent rad that is good for the 30 mm and that is the stealth.
XSPC EX range is 35.5mm i think and EK PE are 40~.
If i were you i would stick a stealth on top and a PE on the front, though do double check the measurements as the above numbers were just what was floating around in my head.
*Edit* if it can fit PE rads on both sides, then go for the EK pe all round!!!
Great bang for buck. Look nice too.