The Shadow Land

I find myself between games right now (not counting the continuing efforts to save Disney's various intellectual properties from vauge enemies and the complete stupidity of the heroes). It appears that my brave paladin and Amanda's crafty assassin won't be storming the Worldstone Keep anytime soon, so my PC experience is lacking. I have several options:

Arcanum: I never actually managed to get all the way through this one for some reason. I know I'd be starting over if I went back, so is it worth it?

NWN: I've defeated both the expansions and a fair number of the "premium" modules that come with Diamond. While a fun experience, I'm not sure if I want to go there again.

HL2 and/or CS:S: I'm at the FPS'd out stage, although the zombie mod for CS:S is something different.

Icewind Dale II: Pretty much the same deal as Arcanum. And how much Dungeons and Dragons can I realistically stand?

Myriad other choices: If I can't remember them now, do I really care?

Also, the D&D Player's Kit is a pretty sweet deal. Especially if there's a sale at Hastings and you get it for $20. Dice, a PHB, minis and a "solo adventure." Not bad.