Re: new guy
Nate, welcome to the forum (again). Please don't feel you're being ignored, but you just asked a couple of the most asked questions by newbies, and a lot of forum members are getting tired of answering the same old questions all the time.
After reading more of the old threads, you'll soon discover that you purchased a high 14 sec. car, and there really isn't a lot of things you can do to make it much faster unless you put it on the bottle (NOS).
Do a search of..."Sprint Booster"..."Cold Air Intakes"..."Custom Exhaust", and this will give you somewhere to start. I personally don't think that you'll actually see much of an improvement in performance, but at least it will sound and feel like you did.
I think most forum members will probably tell you that you should have purchased a SRT6 if you really had a desire for a supercharged car in the first place. But since you purchased an '04 with 40k miles, it would have cost you at least 7 to 10k more than you probably spent.
Unless you were hoping for a 12 or 13 sec. machine, I think you'll find your 6 speed XF still performs pretty good. Besides, the Crossfire does everything else so well, you may find out there is more to performance than just low ET's.
Enjoy your car, and the forum.