Is the display/battery/clock still an issue on the 536? I know they had the issues years ago and was resolved, but wasn’t sure about the newer production units if they were having issues or not.
I don't have one of the "newer" 536HPs. There were problems with the earlier productions, which Uniden addressed with a service campaign, as well as (based on comments by the late UPMan) changes in the production process. The few comments I've seen since then, regarding fading display or battery issues, were from early production units that never were sent in for the repair process. I don't recall any battery, or 'fading display', complaints for units actually produced since that time.
The 996P2 is, from all comments, a solid performing scanner. I've had zero problems with my 536HP nor SDS200.
If, at some point, you might want to connect your scanner to your network, the SDS200 would be a better option than using the WiFi dongle on a 536HP. Also, while you indicate that you don't have problematic simulcast systems to deal with at this time, that could change, Fir thise reasons, if allowed by your budget, I would lean toward the SDS200.