I can only speak from experience as a cz3d owner, all i can say is its personal preference. I went with the 3d a year ago. It works great, depth, sens, ground, everything works like its supose to. I read everything there was to read on it, Ads, posts, reviews, field tests. Everything this machine had to offer was exactly the kind of machine I was looking for. ......for the type of places and type of hunting I planned on doing...(coinshooting northeast older colonial sites) ...in 08 many relics and coins were found with this machine.....my headphone jack didnt last very long on it tho, ..just goes silent, no sound in the phones or from the machine when i plug a pair in, and i tried many pairs...loose wire?....dirt?....who knows! maybe a damp twisted papertowl in the hole will clean the dirt out, if it is dirt.
yeah, they would have to send me a loaner if i was to send mine back, id rather not waite 2 months for the thing to come back. too many horror stories about returns and repairs are listed in these forums.....but thats every company, ....I hope you make a good choice for yourself, consider what type of hunting you want to do, and what type of money you want to spend, read up on it, ...ask other owners....good luck