I don't have a lot of time but wanted to extend a huge thank you to NSX JR, who was able to get me a new RNS-E compatable XM module to replace the one that came with my S4. His price was unbeatable - almost $100 less than Clair Parts and over $100 less than the dealership. The swap took maybe 5 minutes and within 10 minutes of talking to customer service (told them I needed to disable my old radio and activate a new one) I was up and running. I'll be back tomorrow to ask a few questions about scrolling options. Thanks again Lee!