What it your display?I have the 700 and used it for a year with just dvd and blu ray.Had no issues playing both formats all year with good picture quality. Decided to buy 420 a month ago mainly for 4 k optimizer that works when streaming 4K from Netflix. Well first thing I noticed was a fantastic dvd picture quality, better than the 700 and my Oppo 103. Sound quality also seemed more powerful than 700. Im still in audition stages but I ave a ton of dvds so the 420 is a keeper for me.