A million times this.Speaking as an engineer who works in semiconductor manufacturing, "overkill" with regards to computational power is something that only exists in fantasy- like when a kid says "infinity times a thousand."
If your computer was freaking Data from Star Trek with an advanced, infinitely fast network to Skynet, The Matrix, WOPR, and JARVIS with a mind reading, prescient, completely benevolent interface that looks like Kate Upton, but still cooks and cleans up after you - there is still room for improvement.
You're eventually bound to hit the limits of your machine and start swearing like a pig.
It's like a gas.
I spent the whole day of yesterday cursing the day I went with just 64 gigs of RAM.