A good strain gauge is a revelation in analog audio. A great strain gauge is better still. With a mercury tube based power supply into a battery powered tube phono stage, Jeffrey Jackson and Dave Slagle's strain gauge is at once revelatory and simple in it's implementation. Due to the nature of a strain gauge, this cartridge does come with it's own pre amplifier. So if you're a vinyl junky, go direct into your amplifier and you've got one of the best sounds in analog. Limited availability and a wait is often required as these are hand made works of art.
For a decent summation of what a strain gauge cartridge is go here.