I still have my Acura TSX as a daily driver and it's been running without any issues since I got it 2+ years ago. But that's never been my "toy" car. I had modfied '91 300ZX Twin Turbo for 8 years, which I just sold recently.
To replace my Z, I just purchased a 2009 Nissan GTR. It was mostly stock when I bought it. The previous owner upgraded the brakes/rotors to the tune of $4k last year. It has been babied by the previous owner and has been serviced religiously at the dealer. I have all the records and documentation. The car has never even been launched.
I had been trying to purchase this car the last 2 years, but I moved from Chicago to DC, so I had to put it off. Then I had to wait until after we purchased a home in DC, which I just did in Dec 2013. I found the right car at the right price and jumped on it. I already knew the car was quick (even stock), but I am most surprised by all of the insane grip! It's just a hell of a driving experience.
Since then, I have added an HKS midpipe, which adds a little power and a throatier sound. Next up is a Cobb Accessport and a custom tune, which should make a big power difference. I don't plan on doing more than full bolt-ons (intake, inlets, downpipes, exhaust, and Cobb tune still left to do). With full bolt-ons and a tune, the car should be doing between 550 - 600 whp. Here are some pics