It is so hard to pick one, but have to agree with the Deep Purple Made in Japan choices from earlier. My cd changer is loaded with 10 all the time and I have about 500 to choose from. Everything is from the late to mid 60s to through about the mid 70s. Except for some that have continued past that era, such as Aerosmith, Rush and some Stones. Right now I have Led Zepplin, Emerson Lake and Palmer, Deep Purple, Rush, America, Humble Pie, Heart, Bloodrock, Cream and Black Oak Arkansas in there. When they are done 10 more will go in.