Purchased the AKG D40 for use on a drum kit, build quality is fantastic.
It feels very robust with a good strong front mesh that should prevent any damage from flying drum sticks.
The mic comes with dual thread sizes so there's no need to look for an adapter if your thinking of using it on a stand.
The supplied plastic mounting clip looks like the plastic won't last but don't be fooled, it's allot more robust than it looks.
Sound quality is good with little EQ required to produce a great sound.
I have yet to use it on a guitar amp but my guess is that it will handle SPL's well.
Very compact in size, you really can't go wrong with this, definitely going to place an order for some more.