-Agree with POS and Widget. When starting new there is really no competition between the vintage stuff and the newer 2216 and alike. And no meaningful price difference either compared to the overall build cost.
For pure LF (<200Hz) you can absolutely use vintage units, like a 2235, but to meet a driver/horn (>700Hz) you either need to go 3-way or use a modern woofer like 2216. I run 2216Nd-1 ported to 27Hz in my DSP 4367M clones and they are just awesome.
If you use subs there are a few more alternatives.
Have a nice weekend
//Robert