I have had a 1999, and 2004 LT, just got the first 07 on Dec 30. It does have the HID standard. It and the 06 had a bit more HP, I think they did it withthe intake and electronics, the 07 does sound throatier that the 04 and 99. Electric center stand is AWSOME. the dealer said the 07 has a bit different camber for slow speed, it does and the 07 does handle much better at slow speed. New comm system has all the bells and whistles, jury is still out on the reliability. If you are going to have an Ipod, suggest you get the provisions for the 6 disc changer (DO NOT GET THE CHANGER) I was told the wires are not there to put the I pod in the LH saddle unless you get the prep.
I bought a Garmin ZUMO, it's mount bolts right to the GPS prep. You can pick up power for it in the factory prep wiring, run the audio out to the AUX plug on the comm and have 2 gig of music, voice directions and XM. I did blue tooth with the Motorola 820 hands free kit wired to the phone jackand a Samsung Blackjack, rings in the headset and all.
I paid a shade over 20k. Demo with 7 miles.
Hope this helps