Thanks for the feedback - it's nice to see more people validating the front swaybar approach. I like your tire choice as well - a very good setup for running street tire, I'd say.
As for light exhausts, it seems like they all do the same power wise (which is to say not much) so just look for a light setup. Canzoomer sells a titanium setup that is probably quite light, but it must be pricey.
You can't drive money.