Regular or light

A point I want to bring up in the crit is about regular and light fonts. I think regular will show the fonts source (Helvetica) more but light could give it a completely different feel. Of course if I have time I will make both a regular and a light font but I need a first one to focus on.

I made mock ups of both the regular A and the light so people could maybe say which one they preferred and I should go about designing first.