I'm sorry you're having such trouble with the 105's...it is rather surprising to hear of such issues. I don't want to sway your decision, but...I used to have the TIME RXL Carbon pedals on a previous bike that I sold. They were fine at the beginning, but roughly a year later they got to the point where they were extremely difficult to unclip. So much so, that I sold them with the bike just to get rid of them. And yes, the TIME RXL cleats do wear quickly...much quicker than my SPD-SL cleats. Just some food for thought.

I think if I were in your shoes, I'd give the LOOK pedals a try.