Which website will give me accurate suggestions for music I will like based on other bands that I love?

I would like to go to a website where I can type in the name of bands and songs that I love and have the website spit out a list of suggestions based on music of the same genre. That way I could use more mainstream bands to learn about more obscure bands of a similar sound. I know pandora used to do this – I tried it a few times back when it was free but I never really discovered anything great from it. Any other suggestions?