Originally Posted by bb609
Quality of construction makes the difference IMO. If all you need is a cover, factory builts aren't bad. You'll see the difference 5-10 years later when the roof starts leaking, critical wood splitting, etc. depending on the builder....but that's just my $.02.
Edit - I'm looking to replace a 12 x 16 this summer too.
In NH, you should check out Reeds Ferry Sheds, depending on your budget of course. I just had a 10 X 12 delivered and installed (in MA) from them and I'm super happy with it. I've also had the occassion to both build one this size and be involved with the placement of an Amish built shed this size at a freinds house. The Amish do build a quality shed, but you have to have access to the site so that the truck can back into the spot and drop the unit in one piece. They use a ceramic based paint on theirs which looks brand new after 5 years.
All in all, I'd say Reeds Ferry is the way to go - Quick, quality and guaranteed for 20 years.