stoicsentry: I'll probably get one of the others, and I'll use this thread to help me pick which.... in the mean time...
I don't know whether you decided to get another beside Grimrock, and if you did get another whether it was Trine or not, but I am currently playing Trine. Well, an excellent physics-based platformer, I must say, but one that is so horribly marred by next-to-non-existent save game system that literally forces me to finish one level at one sitting. I heard they rewrote the engine to be more save game friendly in Trine 2, but for Trine it is simply an irritating developer decision for me.