Did you buy the turbos brand new or 2nd hand?? as i know (in mycase anyway) i couldnt get them with actuators for some reason hence why i bought the HKS actuators. Some people re-use the std actuators and have issues, just to rule out all possible issues
The blitz ebc are good bits of kit just make sure you get the dual solenoid or spec r variant i believe, can pick them up reasonably cheap
Godzilla have a good rep from what i have heard anyway, Queenslanders jump in here thanks, NUR33 has his families white R32 drag car tuned there and the results speak for themselves