I have a variety of digging trowels and a variety of shovels. For my general hunting, my Lesche gets used the most. In years past, I have bent and broke my share of trowels. Yeah I was cheaper back then and didn't pursue what was marketed much. Then a buddy had a Lesche, was telling me about it and let me use it one day while we were out on a hunt. I ended up buying one and it's still doing it's job to this day (well yesterday evening hunt). I should have pursued quality trowels but always had plenty of the cheaper stuff laying around, and when one would break, I'd grab a spare - always took spares along. I'll stick to the Lesche for my general hunts now.
For digging holes beyond the Lesche size, I have several Wilcox stainless steel diggers, from smaller then Lesche size up to oh about 16-18 inches. With the longer handle, I can get deeper and use the handle as a lever to pry out another scoop. Wilcox has a variety from smaller than Lesche to the larger size to fit into other applications for a variety of conditions. My first one was about a foot long, I liked it so well that I bought one of each size they offer, and since then, I have double on a number of them.
Shovels - after a number of the cheaper local garden department stuff, I finally bought a couple replacement shovels at a local detector dealer. I started out with the Ground Shark and Sampson. Hey, these held up and didn't break under rougher conditions. Yup - went back and one of every model he carried. I have a few 5-gallon buckets now just to keep the shovels together.
Picks - I'd have to go in the garage for the brand name - but like anything else, quality really pays here for the hard dry ground prospecting. My local dealer carried some nice picks, so yup, bought em up a couple years ago. Picks go hand in hand in these conditions along with prospecting hammers. Yes I have a few prospecting hammers but the one I had seemed to use the most is one of my older Eastwing, it has a "S" shape neck for has held up well. And yes a few chisels of a variety of sizes when the need calls.
It's just nice to have the quality stuff that can do the job and hold up well.
The wife really appreciates the use of the variety of digging tools we have for her landscape needs around the home - and that's okay to me.