I have a 2003. The interior is very nice. I am not a huge audio guy, but the bose system does sound good. It is more than adequate for me and I would consider most people. There does appear to be a subwoofer somewhere under the AC controls. The controls on the steering wheel are nice as well. If you get the full leather seats you get the bose system. The console is slightly different as well. I have a picture of it here. http://www.picturetrail.com/gabe11
I believe the new Bose system is more than adequate for most owners. It has real speakers this time and even a subwoofer. I didn't see much difference in the seats compared to the 02's.
I really love the new console compared to the 02's. You get more cup holder area space, a wider and deeper console lid and a bigger cd holder area which while give you more options for some larger mods