Cat doesn't have my tongue. I simply asked my questions to find out if this person has a firm grasp on what the the various machines are, or if they need an education first. Since they answered "all of the above," as you indicated, I have no intention of attempting to pick out a machine for them. What I WILL do, is provide points of learning, so they can better understand what is being offered in the market.
Frankly, with "Google" being available, pretty much world-wide, it makes more sense for Mikka to be directed to what the capabilities of metal detectors are, instead of having forum members just throw out "Two box". That won't make any sense to someone who doesn't understand the basic technology and capabilities of VLF, PI, and Two Box systems.
Mikka, Here's some research start:
Differences between VLF, PI, and BFO (Two-Box). This will only tell you the technical differences:
Metal Detectors - Theory and Practice - VLF, PI and BFO Schematics
What a Two Box Metal Detector can do for you:
What are the Best Two Box and Deep Metal Detectors? | MetalDetector.com
Answering your question about the Makro Gold Racer. This link contains Air Testing -(Shows how deep the Makro Gold Racer will actually detect) - Please Note! A large men's gold ring only detected to 38cm. This is good, but not out of the ordinary for these types of detectors.
Makro Gold Racer. NEW 2016 | MD-Hunter Blog
Basic Comparison of Handheld Detectors:
Metal Detector Comparison Table - Mr Metal Detector
Basic Chart showing the Depth Maximums of the above charted Metal Detectors: - Please note! Under some ideal conditions you can add a maximum of about 50% to each of these depths, but adding half of the depth possibility to a 9-inch depth, only takes it to 13.5-inches... Also extremely large objects (such as a car hood), will actually detect even farther away.
Metal Detector Maximum Depths for Coin Shooting - Mr Metal Detector
EDIT: I should also note, that typically, a pile of coins, or a long chain, or anything where there are multiple targets, the detectors will typically give you the strongest signal off a single target in the pile. Metal Detectors rarely will detect a pile of individual targets as a large "lump." This makes it very difficult to detect piles of targets at depth, unless you're using Two-Box detectors (which are looking for such things).
Cheers,
Skippy