I agree with Sealion,
There is no need for another VIP aircraft. People have mentioned that VIP aircraft are purchased from Berties pockets, true, but who maintains it and puts fuel in it. The purchase of an aircraft is peanuts compared to its operational costs over its lifetime. The Air Corp is already being stripped bare paying for 2.5 run abouts let alone a wide body jet. As for an A320 for troop movements, we dont move enough troops during a year to warrant such an aircraft. This could be offset by the purchase of a 737-QC type aircraft to allow for resupply and humaniterian operations but stop and think. During a mission setup Irish forces are likely to be sent to countries with poor infrastructure, IF you can land on the runway how do you unload the aircraft? with the brand new scissor lift at the destination? And what load can it take, Certinaly not traditional military 40' containers but rather some ULDs, now the Army have to change the way the transport goods to suit the aircraft!
Just think why Tactical Airlifters have ramps and Strategic Airlifters dont. Also consider that the difference between Tactical and Stratigtic is as much about size and operation as it is about distance. Decide where the Army are placed (not geographically) and that should decide the aircraft required to support them. There are goog reasons for it and reinventing the wheel dosnt work, it takes time and money and still turns out to be round.