I know that several people here on the forum have a Vaistech SoundLinq2 or other analog product for the Lexus cars. I just went through the process of upgrading to the Vaistech MultiMediaLinq in my LS430 with Nav and ML, and it is well worth the effort. You can really hear the difference on bands like Phoenix, or on remastered re-releases (i.e. Beatles). If you already have an SL2 installed, the same harness is used, so you don't even really need to reroute cables. The main difference in the product is that it is a full digital output (and also has a USB input), and you can really hear the difference! Sounds truly like the CD player is player an original DDD disk. Also, you can still use your iPod with it, as well as USB drives and I have even used one of those USB-powered small 160 GB WD drives. It also plays FLAC from USB (which the iPod doesn't - grrr!) Anyway, I just wanted to pass on my sincere recommendation to my fellow Lexus community members.