XM vs Sirius radio for my 2008 Prius?

I was last on this forum in 2008, my Sirius in-dash TOY-SC1 Tuner interface [no longer made] died today which was recommended back then. I would prefer an XM in-dash radio for my satellite-ready Prius but don't see any available except through the dealer. Any thoughts about best fit, Sirius vs XM? And do I need new wiring or can I just get the tuner? Has anyone else replaced a "Directed TOY-SC1" SiriusConnect Tuner Interface? Thanks for any direction you can give.

 

Update: I need a Sirius radio: they will transfer my membership which just renewed for a year. What equipment do I need to replace my broken sirius in-dash radio?