You may be able to convince him of the difference between an automatic and a manual, but he may still prefer the automatic.
If he is just going to be cruising around on the highway an automatic may be good enough as far as sports-car-ness goes. That's not really sports car driving, after all. Leaves a hand free to wave to the girls, too (j/k)
And even an automatic 944 is a lot more sports car than the Mark IV I seem to remember him driving from that other thread. Maybe he can autocross against himself in the two cars!