While I really like the little 4 X 6 Shooter coil on my MXT, I have never found a 4 X 6 in the 6.59 kHz that impressed me. And, I've owned 4 or 5 of them over the years. I'd read some good reports from guys that had them, so figured it must be something that I had overlooked. But, again, after trying 4 or 5 of them, I have come to the conclusion that they just can't be compared to the similar Eclipse coil. They are pretty sensitive to small targets and are easy to work around objects in the field. But the depth is not nearly as good as the 5.3 coils. I'd estimate a good 25% less in my soil. Of course, the ground here isn't mineralized to the point that I need the DD design. Personally, I like the 5.3 BlackMax or Bullseye. I've got one of each and can't tell the difference in performance. I've had a couple BlueMax 600's and they are good too. But I prefer the black colored coil over the white ones. The main thing I would look for is the shorter cable. (+/- 42 inches) Seems to me that the longer cable would be OK for hip mounting. But I think having all that cable wrapped around the rod makes it a bit more prone to interference. And with those I have had with longer cables, for some reason I can't tweak the Sig Bal up as high and maintain stability. HH Randy