I recently bought the Secon Trex 204 model, It's a German made detector and Secon's newest Land model using old TR technology only high performance with much better stability over the old TR detectors of yesterday. Plus, Has audio discrimination running in all metal and has a (SAT) Self Adjusting Threshold to boot.
I like it, Being an old time TR user this is by far the most powerful TR I have ever owned. The only thing is it operates on 14kHz instead of 100kHz so it looses some see through iron abilities but gets very small finds comparable with today's faster processing detectors, And gets comparable depths with today's top end detectors as well.
Not a detector for those not used to using old TR technology, I would say about 95-98 percent of today's users would hate this machine and dis-guard it after a few tries.
Paul (Ca)