I'm thinking about picking up some spare parts for the 92.  I'm thinking this parts kit and spring kit.

https://www.cdnnsports.com/beretta-92-96-m9-factory-parts-kit-22-piece.html

http://www.brownells.com/handgun-parts/trigger-group-parts/performance-enhancing-kits/beretta-full-size-pak-sku969000036-16489-37113.aspx

In addition to these I'm going to pick up a bunch of recoil springs, a guide rod, and a locking block.

Anything else I should get?

The main wear items are the recoil spring, trigger spring, and locking block.  Wouldn't really worry about much else until I had tens of thousands of rounds down the pipe.

It is still good to have parts on hand though. I recently launched a trigger bar spring into the unknown never to be seen again. I didn't have a spare so I had a gun down for a day while I located a replacement. Now I keep spares on hand.