If you are sticking with 5e I would recommend any products *except* 4e.
coldn't disagree more. You do realize 4e is the reason we have a 5e, right?
5e has lair actions, and really simplifies stat blocks, just to name a couple.
I found an old White Plume Mountain module at the bookstore the other day. There were a handful of modules but this was the only one I recognized by name (I've never played any AD&D anything before...it's all new to me) and it didn't seem overpriced.
Just started reading through it and it looks like lots of fun! Anyone play this with 5e? Looks like it'd be really easy, the only thing I'm trying to figure out is how to determine the PC level from 1e to 5e

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.