I use three sources for information on icing:
Gramet, which has already been mentioned and which I agree is very good
Jeppesen:
JetPlan.com Graphic Weather
This can take a while to load but allows you to look at 12, 18 & 24 hour forecasts at different levels
RocketRoute: if you subscribe, you can get a route icing forecast as part of your briefing pack. It tends to be much the most pessimistic of the three.
If it looks as though icing may be a risk, I always plan on the basis that it will happen and ensure I have an alternative altitude or other escape route that I know will work. Flying a similar TKS non-FIKI SR22 in the UK and non-mountainous bits of Western Europe, I can only remember losing one flight in the last year.
BTW, if you aren't already aware of this, with the SR22 TKS system it's important that you run it regularly to ensure that the panels wet out properly. It's also a good idea to take a piece of cloth wetted with TKS fluid and wipe the panels on the wings and elevators with it before flight.
I hope this helps