I would check out some of the adventures for Next. Like Scourge of the Sword Coast. If you like that, they yeah I would switch to Next now. Because the adventures are so far excellent, and there is no reason to not enjoy them right now.
"So far excellent?"
There's one really great reason to switch to Next: you want to buy a bunch of new books. Otherwise, buy one of many excellent games that are already on shelves and available as used books, or some even-better games that are actually free.
Next adventure: Reclaiming Blingdenstone
All I remember is orcs that would fight beyond their own hit points, readily destroying any PCs that would reasonably wander through the caves.
Next adventure: the Mines of Madness
[sblock]A magical rune, at the
beginning of the adventure, that seeks to collapse the dungeon entrance on the PCs. What a great way to bring the entire remainder of the adventure to a stand-still. And the outhouse -
at the beginning of the adventure - threatens to flat-out kill a PC -
before anything else has happened.[/sblock]
Just...short of excellent.
Fairness: these are criticisms of the adventure-writers, not the Next system. But it's quite possible that these are part of an omen...