Needles : the DP-1 and DP-11 are 100% identical inside so the DP-1 is a DP-11 with the ability to also take non-Ai lenses. A good working DP-1 (there are still some) will cost you far less than a DP-11 and will work the very same way.
LEDs : the DP-2 isn't repairable any longer and is quite big. Most of them are now dead.
Now the DP-12 gets most of the hype but keep in mind that the DP-3 is a DP-12 with the ability to also take non-Ai lenses.
At the end of the day the DP-1 and DP-3 have more versatility than the DP-11 and DP-12 while they have the exact same inwards.
The real problem of the DP-1, DP-2 and DP-11 finders is that they have CdS cells. Those die sooner or later. And there aren't parts for them any longer.
This is a different problem from the jumpy needle one - the latter being due to bad contacts between the circular brush and its matching track.
I once got a mint DP-11 with a needle which wasn't jumpy at all yet the low-light CdS cell was dead so in low light the needle moved too much for about 2 EV and all my slides got underexposed (and ruined). Yes the paradox is that with a needle meter, when the low-light CdS cell is dead, the meter becomes very reactive in low-light. Caveat.
Of course there are separate Lo-Hi trim pots and a central balance to adjust the meter under its hood but once the CdS cells are dead, they're dead.
The DP-3 and DP-12 have more durable silicon cells.