Just started NWN2 tonight. Played through the initial town attack sequence.
I wouldn't say it's too graphics-intensive. I'm running it on a E6300, XFX 7600GT and 1GB DDR2-800 RAM. It's on 1024x768, all on max, except antialiasing which is off. Runs decently. Some camera movements and interface controls feel a bit sluggish, but that's about it.
I'm a huge BG2 fan and long-time DnD player, so I guess I'll like it. NWN1 was enjoyable, tho not as much as BG2. Shadows of Undrentide was a bit better tho. And I didn't get to play Hordes of the Underdark, nor any other modules. There are too many of them, lol.