I love brakesets and have quite a few in my stash, but I've been a longtime fan of Mavic's 851 SSC derailleurs, so I've had may good share of them:

I now have them on pretty much all my 80's bikes, including an 801 set (silver non-SSC version, but otherwise identical) on my PSV....
Glad to find all of them when they were still affordable. Now they are too expensive for my project budgets, thanks to "mega price" sellers that drove their and many other C&V French component prices up to about double in just the last two/three years.......blehhhh.... So not too many new cool component buys since...
Oh, here an cool crankset that I need to eventually find a project to land on....