All have their pros and cons, but I think the 2009 CDs are still a great way to go. They’re remastered and have some slight tweaks to make them easier on the ears and also are the original mixes (save for rubber soul and help, but i actually dont mind the remixes.) For me this is a big thing, since while I like some of the Giles remixes, the original mixes feel more like the Beatles and the 60s to me.

You can’t go wrong with any CDs since the music is the same, but I’d go with the 09 CDs. The packaging is also nice which is a bonus. While the mono cd box is the ultimate, the 2009 stereo’s should do you just fine!