I've ridden my Heckler (5.5") with a 32 (130mm) for the past several years and have been quite happy with it. I have the 36 on my Nomad and I am happy with that too.
I think the Heckler is pretty nicely matched with either fork, but I would think that whether you choose the 32 or the 36 depends on your riding style. if you are doing more XC type trails, then probably the 32 is better suited for you. if you are doing a lot of free riding, then the 36 might be your choice.