WTB: Fast 4 Door

[ViPER1313]

Life is too short to drive a Toyota Corolla. Trying to keep the budget to 5g or less; this will be a 3rd car, and I likely won't keep it for much over a year or 2.

Wants

1. 300+ hp. 400+ preferrred
2. RWD or AWD
3. Large. 5 series sized or greater
4. 4 doors
5. Not a basket case. I don't want to drop thousands of work into it as soon as I purchase it. I am willing to do one major mechanical repair (new engine, new transmission) if the body and interior are in good shape, I just don't want to do major engine work + new wheels + new tires + body work + refurbish the interior. Body + Interior condition > mechanical condition.
6. I would prefer something German or American. 
7. Traditional automatic (not DCT or similar.) Manual is OK too depending on the car. No DCT or anything similar.
8. 1998 or older, or if newer, something that can be put through a MD state inspection within 30 days. If newer than 1998, the car can't have any engine swaps / removed emissions or similar, and must be in very good shape.
9. Value for the money. I am trying to be in and out of this car for as little as possible over a 1 or 2 year period. Ease of resale and maintenance costs do factor into this.

I don't drive very much at the moment, so overall reliability is not a terrible concern so far as I can reasonably put 5-10k miles on the car over a couple of years. So far I have looked at a 1998 Jaguar XJR and 1998 BMW 750il, and both were basket cases that would have needed another 5g worth of parts right away for them to be semi functional.

Edit:

Cars I have been looking for

BMW 540i w/ M-Sport appearance
BMW 750il
Jaguar XJR
Mercedes W140 S500 / S600
Audi A8 / S8 (only recently, not very familiar with these, and am not super hot on the VAG)