It's difficult to refute claims that the 60s was a golden decade for music. An astonishing period in history, it not only saw credible pop enter the mainstream for the first time, but it also proved that music could be an art form with the power to change the world. It all began with The Beatles, Merseybeat and the British Invasion – yet, as it transpired, that was only the beginning. As the decade matured, so did the music, with pop gradually giving way to progressive-minded rock, and visionary records such as The Beatles' Revolver and The Beach Boys' Pet Sounds shifting the focus from singles to albums. From then on, new genres such as psychedelia, hard rock and prog all produced a litany of glittering stars, which makes compiling a list of the best 60s bands a challenge. Read on and see if you agree with our choices…