I friend my UNO
You likely either pulled >= 40mA from a pin, or shorted a pin to ground, or something like that. Be more careful.
maybe I should get a different Arduino. Or even better
They can all be destroyed in the same ways. More money won't protect it from misuse.
I don't need things like outputs, I can use shift registers.
Bigger Arduinos have more outputs by default, for the most part.
All that aside. I'd recommend getting another UNO unless you have some specifically large project. I use a Mega, but that's because I needed a lot of pins.
[A good read.](http://maybe I should get a different Arduino. Or even better)