I think the F75/F75 LTD is about as good as it gets.
I think the only thing I'd change is maybe to make it more EMI proof, but its a fact the more sensitive a given detector is, the more its apt to be EMI sensitive.
The F75 is an admirable coin shooter, but its real strength is it rapid recovery speeds, and its ability to sound off on co-located targets, as opposed to a lot of lesser machines out there.
It light and easy to use, and has astounding battey life. Some have expressed concern over its build quality, but I gotta tell you, I have one of the origonal F75's, thats never been sent in for anything (including any "upgrades"), it its still tickin. I hunt stubble fields........woods, and do a lot of bushwhackin with it, and have never had a failure. none. Considering its perceived "flimsy" construction, its held up every very very well.The only thing I did to it was change the arm cup to something I liked better .(an old Shadow arm cup).
The LTD, in normal modes, is an exact clone of the F75, BUT, when using one of the Boost processes, it changes quite a bit. It still has that F75 flavor, but the responses are much more robust and solider. Its far more than just an audio boost. My LTD can get a target in the woods where there is a good deal of overburden very well, when the origonal F75 wont make a peep. It does get a "bit" more "in the ground" depth, but its minimal. Its strength is its ability to get a target holding the coil 6" off the ground that "may" have been heard (barely) with the older machine by scrubbing! (and get it very well). It (the LTD) also is a bit quieter and stable in BP mode than the origonal F75 is/was.
Now that I have an LTD, my older 75 is relagated to backup status.....but if it werent for the LTD, it would still be on top on the heap compared to most other machines I have used.
If though, your used to a relatively quiet machine It may take you a bit of time to get used to it. you hear a lot more with it than most other machines out there. A lot of guys dont like that. IF you take the time to really learn and become accustomed to it , it will serve you well. Good luck with whatever you choose................ Streak!