Am i getting this right, Gogsie?
Your wanting to uprate the actuator, when you don't even know if you NEED to?
I reckon you should drop Andy a wee PM/email to ask for his idea's, but i wouldn't have thought he'd agree with another actuator.
If you do have an AVCR, which i see Wuz has pointed out, use that and forget about it till the mapping day comes(or sooner if you ask Andy), then take it from there. I've heard bad stories about uprated actuators, but i won't elaborate as it's not be hard evidence.
Another thing. If your worried about the main problem with the actuator(boost creep), then the uprated actuator wouldn't combat that really. Porting the exhaust housing of the turbo would. Just wasn't sure of your main reasons for upgrading it?