Congrats, David! Let me say, first, many thanks for Dhamma Wheel. Secondly, NICE CAR! I've always admired that little Lotus, it's a sweet sports car.
As to Alan's observation. Alan, couldn't we really say this about darned near anything? If David bought himself, say, a Prius, even then people could complain that he'd be better off buying a bike (or walking) and sending the money to charity. If David bought a bike, someone would say "why get such an EXPENSIVE bike? Best to buy a cheap bike and send the money to charity."
But then, couldn't someone make the argument that living in a monastery and meditating all day is a "waste of time" and that person would be better off "helping poor people?" All of these are fallacious arguments.
Truth is, the reason we have the poor and needy is simple: Capitalism DOES NOT WORK unless you maintain a poor or needy class. This is a truth that is generally not taught at, say, the Wharton School of Finance
BTW, because I see the flaws and weaknesses in Capitalism doesn't mean I am a Communist! (I'm actually a Socialist, but that's another issue.)
My personal advice to David? Enjoy your beautiful Lotus in good health!