Of course the London MET guys are right. The MCC was designed to be sat in a cardboard bomber which is pretty much what they offer you. Only problem is that the market has dictated otherwise.
Many of your colleagues now go off and get an MCC in a jet, then pay to do a jet handling course. When called for a sim ride they are already over the awe of the lights and buttons and slot into the seat and fly the profile whilst many others will be pysched out and pinching themselves that they are flying a big bad jet.
If you back yourself enough then by all means go and do it cheap and cheerful. If not then get ahead of the game.