I plan on buying my girlfriend a new car when we get married (tentatively late 2011), most likely a late model BMW 3 series. She really, really wants me to build her a Beck replica Porsche 356, and I'm going to oblige. In trade, I get to build a 3-bay man cave which will be replete with full air feeds, a four post lift, and more.
As for me, my DD is currently a 1997 Nissan Maxima that is modified to the hilt. Supercharger, coil-over suspension, upgraded transmission... but she looks totally stock (save for some lighting upgrades). I love the idea of a 4-door sports car, and my next vehicle will most likely be either an E39 M5 or a Merc E55.
Down the road, I'd like to acquire a 360 or 430, and probably a 512TR as well. I've always loved F-cars, and it has been a lifelong dream to own a few. I'll never get rid of the NSX though; she was my first love (hence the large garage).