I'm new to this forum, but not new to forums in general.

I am potentially going to buy a new '05 or a slightly used '04 TL in the next month or so.
I love the car.
In my research, I have only found the trannies are something that I need to worry about on '04's. Other than that, they seem solid.
Is there anything else I'm missing that I need to check on with any pre-owned vehicle I'm considering?
Only other question: Can you have Sirius hooked up instead of XM to the factory stereo?
Since I'm new, my background if you care:
I'm a total car nut! I currently own an '03 Explorer and an '02 911 Turbo.
I used to have a '01 BMW 330i and am considering the TL as its replacement.
I'm a mod at 6speedonline.com and funcarsonline.com. I may 'know' some of you.
Thanks in advance for the info!