I recently upgraded my Garrett 350 to the AT PRO. --I'm well satisfied with its multiple performance features. With my 350, I had the Super Sniper coil in addition to the standard coil. The small coil worked fine, but it was a bit intimidating to look at a large yard knowing I was limited to a sweep pattern of only a few inches AND a reduced depth detection. So I'm wonder if the 6.5x9 concentric coil is somewhat of a compromise between the Sniper and the stock coil. I suspect the recommendations here will be to go for the Sniper for this unit also.