It used to be a clear winner with Porter-Cable, but last fall about this time they were purchased by Black & Decker

They have made many changes and are no longer the company they used to be. I would go with the Bostich or see if HD has a Ridged kit. The Ridged guns are clones of the Porter-Cable guns and are even made in the factory in China, Campbell Hosfield makes their compressors. Black & Decker/Dewalt is at the bottom of my list for quality and company culture. We would see quite a few of the PC kits come back for warrenty after the buy out and move of the plant from Tennesse to Mexico.