The F75 has just been tearing it up lately. But I am all about features. The F75 will keep me happy, but the CTX 3030 looks like a better fit for me. I believe in having goals. As for your hunt, I am not schooled ondetector. So can only suggest experimenting with all your settings. Too quickly test a poor or weak signal, I can quickly switch in between disc and all metal mode. Everyone's ground is different, but if you set this up right, you will dig more good targets, no matter the brand of detector you use. But it takes practice. While iron sounds like a broken signal and not completely disc out on my F75, I am digging coins with pull tabs and nails on top of them. Im sure your minelab will set up like that also. Iron and bad dirt with a dash of emi has taught me to quickly set my machine and GB. Good Luck.