Is there a noticeable delay when using the Sleek audio wireless unit? I want to use it with my computer when watching movies, but I'm concerned about it having a delay like the Sennheiser kleer earbuds had.    Does anyone know?

I'm certain this has been asked before, and I've found a few hits when I searched. But those were for foam tips, and I want silicon tips. Are there any alternatives to the flanged tips that the er-6is come with? Something softer like the ones shures, and such? In fact could I just buy shure...