... I also heard that you could pick up some bad habits during the IMC course (above all if the instructor is not a real expert at instrument flying), so maybe not worth doing a 15+ hour course (about £2000 with test...) to pick up bad habits for the IR. Just let an IR instructor (who is an expert) do the job. The CPL instrument flying is mainly about full panel and limited panel, so you do not really need a full IMC rating to do that....Do a couple of hours with an instructor to show you a few tricks, and then do your CPL as normal....
Just my opinion... I myself considered doing an IMC, but at the end of the day, I do not think I will....
All the best...
Cheers