You might also like to consider that if you do a 50 hour course of which 40 is in an FNPT/FTD it might be nice if the FTD was the same as the aircraft!
Bear in mind also, that for an SPH ME type rating (i.e. what you'd do if you chose the 135/355 route) you need 70 hours P1; this may be a problem if fresh off a CPL course. You also need this for an MPH ME type but it can be substituted with a P2 only qualification. (This SPH 70 hours requirement seems to have changed in FCL-2 amendment 4, just out, but obviously LASORS do not show this and you would need to check with the CAA I guess)