Ahh...to be in my 20's again and think 40's is old and a good age to "slow down" and retire in. Love the Porsche idea (nothing off about that to me)...but if you have those kind of tastes you better either have a lot of money coming or impose self control.
We all love your dream...start putting away in your 401K now..
You can get a 1999 Porsche 911 for around the cost of a Civic, do the work myself, assuming I don't run into the dreaded IMS failure and take out the engine it shouldn't be to bad to run. But yes, I do tend to have expensive taste. I also grew up making 5 an hour working for my dad in a manufacturing plant (he owned it) busting my ass so I tend to be... frugal. A lot of finance calculators will say I can afford around 50% to twice what I actually could bring myself to do when it comes to buying a house or car.
As for the 401k, i'm doing the max my company will match, and then more then that again personally.