i'm looking to add sat radio to my 2007 wrx oem deck....i'm trying to figure out if the Sirius SC-C1 w/ the clarion SLA-SC1 adapter will interface with the stock deck (since it's a clarion). this option is only $100 compared to subarus $400 package.

so what's the story with the subaru package? does it integrate w/ the stock antenna, etc? i'm thinking its a better idea to buy the sirius one since i can adapt it to any aftermarket deck if i want.

any thoughts?