All the best music is the bands that aint in the spot light, take the kings of leon for example, as soon as they "made it big" and had all the chavs dancing in every night club around the country singing "my sex is on fire" they became less desirable and more main stream.
There are loads of good bands about and the reason there good is because proeper music lovers have heard of them and the general public havent. I am listening to the xx and white lies at the moment which are both good bands imo. Same goes for the arctic monkeys 1st album cracking 2nd album more mainstream but good and 2rd now everyone is sucking them off is wank.