It is going to depend on what the user is primarily hunting for and where and what machines they know how to use. I would hesitate to classify the ETrac as an all around detector, I consider it more of a specialty detector for high conductors. I have had an ETrac and several SE's and my choice of the two was the SE but just because I have used the Explorers for many years and knew the SE much better. I found both of them lacking in the segmented gold, like necklaces and bracelets and some of my best jewelry finds ever would not register at all on the SE/ET.
My three main detectors are the SE W/10X12, V3i W/10X12 and a modified Tesoro Cibola. When I'm hunting old grounds looking for deep silver and coppers, I grab the SE and for tot lots, competition hunts or just a change of pace from the power houses, the Cibola. For all other hunting from jewelry to Relics or taking a quick scan of a new hunting spot the V3i is the main machine. The last of the three to go would be the V3i because it can substitute for the other two from deep silver to speed hunting, but at a slight disadvantage. The V3i is the best all around detector I have ever used from nugget hunting in 22.5 kHz to deep silver in 3 Khz modes.