If you ever do heat it to pasteurize, I have heard to use pectic enzyme to help clear the haze - I use it, and it seems to help clear it, but that could be more a function of long conditioning time.
Last year, I made two batches of cider from the same juice from the same trees. One batch I "pasteurized" by heating to ~155 and cooling with a wort chiller. The other I just juiced and crossed my fingers. The non-pasteurized turned out much better. I think that heating does change the flavor...