High hashing power does not imply secure network necessarily. And ASICs are especially risky since only few guys can obtain them, and they give you a lot of advantage with respect the rest of the miners therefore, it's way more easy for a guy with cash to 51% attack it.

Also, if ASICs become the norm, I'm out of LTC because like many folks have said, Bitcoins was meant to be obtained by just running the CPU in your home, and that's a key factor for cryptos to become succesfull.