A modern alternative to the server Xeon x5650?

Question

Processors

Intel server processors are divorced like dirt. Finding and, most importantly, comparing processors according to the required characteristics on the Intel website is not realistic!
Tell me, is there somewhere on the Internet a certain visual scheme for selecting processors? Or a list of all processes with filters. Interested in configurations with two or 4 processors per server. Preferably, the previous generation (objectively, they are cheaper ... and the difference in performance is minimal).
There was a question of purchase of new iron. Previously used x5650. They cost a penny, they work with a bang!
But! There is an old socket. The mother is hard to find. Plus, it is not clear whether this processor will fit on all motherboards with two LGA1366 boards.