Pace the transition course was 10 hours with 5 flying and 5 hours for avionics & systems, I agree it sounds a lot and from what I can see it is driven by the fact that for whatever reasons even experienced guys were killing them selves or wrecking aircraft and insurers deemed a transition and time on type were in fact more important than total hours.
What we did was phone around the market and find an insurance company that would see a little common sense, these peope reduced the requirement to differences training with an instructor ( about an hour in the air and two on the ground).
A&C how long ago was that and out of interest how many Cirrus Hours do you now have?