IMO..

A .net is not bad, but when your looking in the long run, the .com will be more valuable. If you look at it that way, people will always scramble for a .com and it would always get more clicks.

For instance, if you have a person-person conversation, and your site comes up in the discussion, but lets say 6-7 hours later someone forgets your site's link but remembers your sites name. His first search would be to search .com.

Maybe hard to explain, but I hope you see where I'm coming from.

Registering .net is not bad, and won't affect your business.