Same here. Our 2100TN is still running like new. I don't know that I'd be able to find a newer model as reliable.
I've had pretty good luck the past 10 or so years with a LaserJet 1320. Quick, built-in duplexer, built-in PostScript, works with everything. A couple years ago, I was given a JetDirect 175x, so it's now on the LAN. (Had some other network-to-USB adapters before the JetDirect that didn't always work as expected.)