Advantages to doing an initial instrument rating training in a Cirrus over a conventional aircraft? I live in Australia and I'm in the process of choosing a school for my instrument rating. I need feedback from the many of you out there with IFR experience willing to share their thoughts.

I'm going to do a single engine instrument rating because I am a just private pilot with no immediate plans of doing a CPL or flying multi engine aircraft at the moment. I have CSU and RU endorsements, have flown VFR to this day on a basic and complex aircraft. There are a few schools that I'm considering, with the only real difference among them boiling down to aircraft and, of course, total training costs.

1. Towards the top end, I could train on an SR20 and brand new full
    motion simulator in a posh school.

2. The middle range would be on an C182 or a PA28R and standard
    simulator.

3. The lower range would be on an IFR rated C152 + time on a complex
    aircraft, and again standard simulator.

All up, the costs would go from simple on the C152 to (almost) double on the SR20.

Here's my call for advice: Other than the fanciness of flying in an SR20 over a C152 and learning in a shiny school, 

What are the real, concrete benefits of doing an IR in an SR20 over a more conventional aircraft? 

On the one hand, the C152 has analog instruments while the SR20 is all glass and has autopilot which, I understand, comes down to personal preference. Another key difference is speed. I'd say that flying more slowly might be an advantage to stay "ahead of the aircraft" but then again, that might be beside the point of IR training. I'm the super lucky position to be able to afford both but I still want to make a financially clever decision as I'm not the kind to spend money unnecessarily. In hindsight, that's how I did my PPL and it served me well.

A great many thanks for your much valued answers.

PS. Another factor that does play a role is obviously instructor experience and their availability.

PPS. A definite minus for the SR20 is the "requirement" to do the CSIP endorsement which puts the total costs just shy of that of a multi-engine endorsement on the Seminole or on the DA42 + IR.
There aren't any. Unless you are planning on purchasing a Cirrus, you'd just be burning money for no good reason by training in that. An instrument rating is an instrument rating regardless on what aircraft you train. What is important is the quality of the training, ground and flight. If you think about it, I am quite sure you can find better ways of spending the money you will save.