I picked up a Treasure Ace 100 about 15 years ago. Used it for a few years and got busy with other pursuits. Now I'm back using it but wondered if a newer machine would help. This one still nails coins with no problem signaling loudly every time. I've got the disc setting all the way over and it hits pennies, dimes and quarters. I did stop into a Central Florida dealer but was overwhelmed with the choices. Picked up a Garrett Pro Pointer however and that tool has been wonderful. So many new machines have LCD screens on them so another question I have is are they worth having, do they really help? Finally how fast does a machine become out of date? I know cell phones are great for a couple of years then you move on. Are we there yet for metal detectors?