Yes Larry, there is alot of opinion about those coils already posted. I went out to a trashy park today, and used the 10x6. I had been using the 5.3 exclusively the past couple of months.
I must admit, I feel the 5.3 does a better job in garbage around picnic tables and the like. It seems to me that, in comparing the two coils, it's as if 10x6 gives the detector an extra gain step. That can be a bad thing among little pieces of aluminum, especially if you are looking for small rings down 4" or so.
Maybe what I need is a small coil that's a touch hotter than the Shooter. I have ran that coil in extreme garbage, but I really don't like it that much. I think my SunRay probe could rival it on depth!
It's funny, the 5.3 was the first coil I bought for my MXT. I used it for about 2 years, then decided to get the 10x6, which I liked so well I forgot about the 5.3, and ran only it for 2 years. Somewhere in there I got a Shooter coil for tight spots.
It seems like the 10x6 has too much pop, and the 5.3 not quite enough. (Yeah, I know, I read something about a 'gain' knob on my detector.) Maybe what I really need is a coil that can detect whether or not there is any brain activity going on inside my head!