AZ I have not had that issue with my Nokta FORS Gold, it handles highly mineralized soils very well and much better than my GB2.
In fact the FORS Gold goes into Boost mode whenever turned on, this is the setting that is optimized for mineralized soils and you can still adjust this mode to your liking as well.
The FORS Gold is an extremely powerful and option packed detector perfect for finding gold and it works great as a standard detector too.
I am finding targets deeper and easier than I ever did with my GB2 or GBPro.
The Whites TDI Pro is not a detector that rates very high on my wish list for a number of reasons.
If you are looking for a great machine that WILL find the gold, handles mineralized and trashy soils easily and has an faster learning curve than most then I highly recommend the Nokta FORS Gold.
Buying the Pro package is your best option and its only a little more than the standard package.
The Pro package gives you 3 coils (instead of 1) and you get a wonderful backpack, a set of headphones and rain guards.
The Pro Package is on sale at KellyCo right now for $1,189! (It usually is $1399 and will probably go back up to that after KellyCo's sale is over.)
Here is the link, KellyCo is the only authorized retailer in the US right now.
http://www.kellycodetectors.com/products/gold/1448-FORSP/fors-gold-pro-package
Here is a video of my unboxing of the Nokta FORS Gold.
Here is a video of a very deep bullet that I found, nothing special about the find but it showcases the depth very well.
In this video I am digging some copper in VERY VERY VERY Mineralized soil, check out how orange/red that stuff is. I didn't haven't any problems, in fact even the near by power lines weren't a big issue.
So I hope that I helped to make your decision a little easier.
