I used The Company Corporation to set up my LLC a few years ago. The signed me up for some annual service that my accountant does anyway but once I stopped that it wasn't too bad.
I found a review that implies it's not the cheapest:
http://www.businessservicereviews.com/online-llc-formation-services/company-corporation-review/
As far as which way to go? I needed the LLC to do corp-to-corp billing for my IT contract work. My accountant said it made no difference whether I incorporated in DE or PA (note that I am in PA as well) since I would be doing most of my business in PA, NJ and NY.
Waring Systems LLC is also an S-Corp now so it's not an either/or question.
Bottom line is to check with your accountant to see what's best for you.
Malcolm Waring, REALTOR®, e-PRO
Realty Executives
Pocono Real Estate