you're not going to find much in the way of Ducs or Beemers under $10,000. For a streetfighter-style bike at low cost, I would steer you towards Yamaha's FZ6 and FZ1, Kawasaki's Z750 and Z1000's, Suzuki's SV650S, etc. All these are quick, nicely styled, and much less expensive than a Ducati or...
PSM =Porsche Stability Management. If you turn PSM off, your Cayenne will be more subceptible to slides/erratic behavior in hard driving or emergency situations. Probably best to leave it on unless you're taking it to a track day or playing in a rainy/snowy parking lot.
Old cars are notorious for this. Besides, a couple of weeks is a pretty long time to leave a car sitting and expect it to fire right up. I would suggest buying a quick-disconnect for the positive terminal on the battery.
it does take some time, but with the advantage of the internet, that time isn't terribly long. you can google just about any question you have about how to change your oil, how to check other fluids, etc. as well as questions about how certain parts of cars work. I find the interactive/motion...
if you think the ECU is just a cheap piece of plastic that will make your car run rich, you've got a few things to learn. Intake, exhaust, etc ARE the cheap, "small" modifications. The only other inexpensive mod to get some better performance is to rip all excess weight out of the car.
If...
MUCH too late and not nearly enough of a significant problem to fall under the Lemon Law. If the car runs fine, and it's just the light that bugs you, cut the dang wire and quit whining.
I've had falkens, and while the grip was good, they didn't last long. Sumitumo's are decent, but not really the caliber an Acura deserves. I like Nittos a lot. a good buddy is a big-time tire salesman and his vehicles run Nittos