Deutsch100,
I went to AL and Ed's auto sound www.al-eds.com. They did the whole job for me, cost was about $750.00, but I figure it is a one time investment and I spend many hours a day in my car. I believe they had to pull the dash apart, but they did an excellent job and know one would know it wasn't factory installed. Lexus has an exclusive agreement with XM, so they can't tell you that it is possible to install Sirius. All touch screen and actual radio functions work perfectly with Sirius Radio.
Good luck,
Rockitogden
Thanks Rockitogden! I appreciate the reply. That's pretty $, as Longo Lexus here in So.Cal quoted $800 for the install including parts and labor. Granted, that was for XM, and I do like Sirius better. In the past, I've found out that, god forbid, if you have any kind of electrical problems, ALL auto manufacturers and dealers, will try and blame your aftermarket additions for any and all problems. It's kind of their way of making you do this stuff at the dealer, get screwed with prices, for equipment that they want you to have.
I agree about aftermarket stuff, but I gotta have my Howard Stern!