I own all of robotech on DVD, but I hear the original Macross was a lot better? Is it worth buying it all on DVD as well? After Macross there was Macross II, Macross Plus, Macross 7, and now Macross Zero (awesome anime)?

Could anyone give a brief description of each series, and where it is on the time line etc? Did I write them in order... and why is there a "Macross 7", what happened to 3,4,5,6?

I've seen the Macross movie - Do you remember love, is that a condensed version of the series?

Thanks.