I speak from personal experience: I chose not getting a sports car for the sake of my 1st born son and regretted it immensely it even though I bought a WRX. It still sucked@ss! I should have bought a used a Tahoe or Expedition which I ended up buying later anyway!!
Also, your car has zero to do with being a great Dad, your kid won't suffer at all. You and your wife??? well... that's
TBD~lol