Mattia,
There is a very local school (for you) who operate our of BRS that encourages you to carry out your ME-IR before your CPL. And I can see why it makes sence too, you'll go into the CPL as a more confident pilot and rather than having 5hrs knocked off your IR time for having a CPL you'll have 10hrs knocked off your CPL as you have an IR (Or at least off the top of my head that's right?).
Good luck