I'd have to say that Litecoin is a good option.  People will start looking for the "next best thing" and Litecoin seems to be the most known other crypto currency.  Although Doge and Coinye may change that... but they do come across as jokes.  So Litecoin seems like a good option.

However, if you are considering a bit more long term (in which I mean 1-3 years) I'd consider looking into Earthcoin (EAC).  You can probably tell I am a proponent of that by my name but that is because I think the development team and community are going to make this coin a competitor in the crypto market.

Just my 2 sat.