I hope you 25 year olds are fully maxed out on your 401K contributions ($16,500 for 2011) plus another $5,000 in your self directed IRA's before you start thinking about buying Porsches.
Pay yourself first, before paying Porsche.
I've owned my 2006 Boxster S since new. Custom ordered. All I've done in the past 5.5 years is put gas, fresh oil, new tires, new filters, fresh brake fluid, and new spark plugs into her. Pushing 42,000 miles.
In the coming 12-18 months I plan to proactively change the trans/gear fluid (OEM), flush coolant, and replace the serpt. belt. Don't know when I'll ever need to change brake pads. Never any unscheduled maintenance.
She's been very inexpensive to maintain, IMHO. The reliability and enjoyment have been HUGE.
*I've have spent $1,000's on detailing supplies!
** What I have NOT spent maintaining my Boxster, I've spent keeping the '97 Turbo (993) happy. But, I'm OK with that, mainly because I've done paragraph #1 for over 20 years.