It will be cheaper if you don't need to change your actuator. They'll happilly leave yours on if it is working fine - again it will be tested before hand.

The intercooler will defo improve things, they can set the boost to around 18psi, and you are looking around 200bhp on a healthy engine.

They are busy though, so call them ASAP and they can book it in for whenever you think it will be ready - otherwise u may be waiting. Call them up, ask to speak to Stu - say Rick sent you - he's a good friend of mine