What equipment uses 5687 tubes?

The YS Audio A2 linestage uses 5687s. I haven't found anything better than the Tung-Sol D-getters here, although they are a bit tipped up...but other 5687 types I've tried in the A2-SE make my system sound like a giant AM radio.

The Consonance Cyber 800SEs use one 5687 tube per monoblock (along w/4 EL34s and two 6922s in each). Am using NOS GEs in mine.

They can be used in the Aikido line stage/headphone amp.

http://glass-ware.stores.yahoo.net/aik9pindualm.html

Very nice sounding line-stage.

Audio Research M100 monoblocks as a drop-in replacement for the original 7119's.

The Emotive Audio Sira linestage uses a single 5687 for the gain (plus a lot of other tubes for voltage regulation and current sources), and the Emotive Vita amps use a pair of 5687s for input and driver stages.