Which fork oil?

[darrsi]

To be truthful the bike is mainly used just for work.
I'm no lightweight, my large top box is always half full of stuff, and i take the occasional passenger, so it all aims towards being a bit firmer on the front i reckon.
Worst scenario, if i simply don't get on with heavier oil at least i can always change it and say i've tried it out, and give my opinion.
I have a good feeling that i will prefer it though.