Nice post Monte, my thoughts have been similar to this post as of late... And do I need a D2 or manticore when there's a Nox900 or do I need a 900 when there's a 700 or any above when there's a legend or a smf when I have the all-metal mode of the T2...do I need a different water detector when I already have a simplex? I keep trying to wrap my thoughts around those like you with many detectors and your reasons for the collection. I know I hunt at the depths obtained by any detector out there and also have great separation, I don't think that TIDs do much more than give a person a reason NOT to dig a target...it would be great if someone sold me a more "perfect" detector...but I have yet to be shown by anyone I've hunted with that I'm walking over good targets that they wouldn't have also walked over.
Anyway, when I'm done with this fight for my health, I'll be making the decision on a new detector or maybe just be satisfied with the way my detector and detecting has me enjoying this fine hobby. I'm just not sure that detecting, for me, also includes a collection of detectors or testing the newest flavor, but I maybe swayable.