Got the 911 Carrerra 4 used in a wicked deal; dream of a lifetime. It's an interesting ride. Fun, mindblowingly fun on a twisty highway. Handling in rough terrain is incredible. Driving in the city is interesting in that the handling is so good you don't notice it...it becomes a sedate drive in a way.
What I found to be odd, though, was that the VW GTI I owned was actually more fun to drive in the city than the Porsche. You can feel the physics of the GTI doing your errands - going around corners, the zip of it picking up on a stop line. I really only got the sense of a similar driving experience with the Porsche on the highway.
So, I'd recommend a VW GTI as a reasonable option if you can't afford the Porsche & the Porsche if you can.