Just after purchasing the remastered version of A New World Record and listening to Out of the Blue, I guess this is the best ELO-album, the one you'll be going to listen to frequently. It's their grandest sounding-album, complete with choirs and orchestra and it's (almost) a fantasy-concept-album. Other than bands like King Krimson, Yes and Genesis, ELO will never be 'cool'; too much melodies, very influenced by the Beatles, but that never mattered to me.
Highlights are the intro/I can't get it out of my head, Poorboy and the Eldorado/Eldorado(finale)-tracks! If you want to try something by this band, start here (for under four quid!). You'll be amazed!