Cheese is my downfall...

Ok, I'll admit it. I love cheese - not in large quantities or anything (I'm slightly lactose intolerant), but it does make a nice addition to black bean nachos or on top of pizza. I think if it was not for cheese and sour cream that the transition to veganism would be much smoother for me. I convinced the husband to give up dairy milk about 6 mts ago (Silk Plain is now our staple)and I always use margarine...and I like soy ice cream. But cheese...maybe it's the fact that I have not found a good vegan cheese (any suggestions?) or sour cream. But I view my transition to veganism as a gradual one, so I'm committed to phasing these things out of my diet...eventually. Any tips on how other people overcame this would be much appreciated!