I recommend checking out https://whattomine.com/ . It should tell you what's most profitable with your rig. Check it frequently though, the profitability changes daily with price/difficulty fluctuations.
If you're looking to mine 1 thing for a while, I would choose a project you believe in.
Thank you very much, as far as I understand whattomine gives only limited info there are some other compare sites as well, still not sure which to believe. If I stick up with whattomine I get around 20$/day but most of other sites gives around 40$. Still trying to figure how to exchange if I mine a less known alt coin