Re: [piisfish] wingloading ??
Brit is correct.
A more heavily loaded canopy will tend to open faster, all else equal.
Also, a smaller canopy will tend to open faster, as will a canopy with ZP on the topskin, a canopy with a steeper attack angle, etc, etc, etc. There are a whole lot of things that go into opening speed.
Unless you are planning on freefalling under 200', I doubt you'll go wrong with any of the BASE canopies currently on the market. The differences in opening distance for the full range of "normal" configurations is going to be less than 10 meters or so. You can extend this (in both directions) by doing some heroic rigging, but in general, whatever your wingloading, you are going to be ok.