I bought Pillars of Eternity this weekend, and it's really, really good.
If you liked Baldurs Gate and/or Planescape: Torment, this is going to be right up your alley.
Great writing, classic infinity engine gameplay and holy shit, the fights can be really hard. They ain't kidding when they say "normal" is for fans of the old games mentioned above who are very familiar with the concept. I've played a ton of RPGs in that style, and I got my shit pushed in *hard* a couple of hours in on normal. It's doable - that was more of an "all right, minimal micro autoattack doesn't really work anymore I guess" reminder. But I still needed to reload about 5 times for that particular fight, and you're just used to breezing through with minial effort on normal nowadays.
It's refreshingly unafraid to be challenging, and it slaps several novels worth of text into your face with a "deal with it or not. But that's what this is" attitude. With a ton of branching, really different outcomes. And the dialogue options special attributes or abilities give you do NOT neccessarily give you the best outcome. Also, if you play a Paladin, you better play the alignment of the order you've picked in character creation. If you diverge too much, your powers lessen. Stuff like that. Love it.