We bought a Porsche 911 as a present for coming back from a place in Asia where it was prohibitive to buy even the crappiest car (although pre-baby I used to own sportsbikes). It was cheaper than you think (some good things about the credit crunch) but was AMAZING, particularly if you're into the driving experience, as we were as former sportsbikers.
My baby goes in the back in a Britax (and I have never owned a pram, just wraps) Got some people running up to me to complain about parking in the Parent and Child spaces in supermarkets. They couldn't quite square the hippy back carrying child thing with the Porsche owner 
It was actually not that uneconomical (well, tyres are another thing)
Sadly, think we're going to have to sell as my daughter's getting long legs now and it means we can't fit in unless my husband does all the driving. And I like driving. So it's going to be someone else's pleasure.
I love driving well-set-up cars. I've had cheapo Lotuses (wonderful, like they are sellotaped to the road) as well.
My advice as a regular buyer?
Never buy new. Ever. It's total madness. We're looking at a car (fancy estate, leather seats, 4.2 etc etc, absolutely pristine, one owner, new tyres, low mileage) that is costing about 6k and cost in 2002 about 70k.
Work out roughly the style of car you want, work out what your depreciation will be over 2-3 and then 4-6 years. Check if any new models are coming out. That will bump the price of your resale by quite a margin.
Check consumables. How much do new tyres cost (I once had a car where they cost about 350 each for back -- ouch)
Check mileage. I mean how much you're going to do. Any more than 15k a year and you'll need low mileage to keep you depreciation low.
Diesel vs petrol? You can pay a 2k premium for some diesel makes, check whether
Erm, the minis aren't that great, the coopers are better and DON'T BUY SOFTTOPS. They are a nightmare. Fucking nightmare. You'll have to replace at some stage. And they break.
Good luck, and enjoy. I love cars. Like bikes more, but being a mother has changed my risk profile. Even my husband hasn't been out on his Bonneville classic bike.