With these cards I would point my rigs to nicehash.
Like what this guy said, it's never a bad idea to start with NiceHash, especially if you are a newbie to mining. I would suggest simply starting nicehash and see what coin it mines for you, then, based on this, download the a corresponding miner for that coin and start mining in directly.
Best of course would be to research and try keep a look out for new coins in the altcoin announcement section.