Update:

I got my GLI filter from Crutchfield today and installed it my TCH.

MAJOR improvement over the "naked" aux connection. I think it sounds a bit better than the FM modulator too.

I am much happier now, but I wish that the "hole" for wire pass-through in the console cubby was on the driver's side instead of the passenger side. I have the Roady XT mounted on the driver's side, and thus have to route the power and audio cable over the front of the closed cubby. If I get ambitious, I might see if I can route them under the console (with a little bit of disassembly). I wish I had a manual that shows how to take it apart!