+1 here.
There are basically two schools of spider resophonic construction: traditional (sound well - think Dobro), and modern (open architecture - think Scheerhorn or maybe Rayco).
Regardless of price, either will meet their maximum potential with a high quality cone (Quarterman, Beard, etc).
More important, some can be hugely improved by setting up the spider correctly. If your spider legs get out of flat-plane, your zillion dollar reso will sound awful. Conversely, if your spider legs are put back in-plane and you have good saddles and a good cone, your low-dollar reso may surprise a whole bunch of players.
On my resos, I also dress the legs of the spider, and I dress the contact surface of the cone shelf absolutely flat. These are simple operations. They take some time, and some folks think I'm nuts, but to me it's worth it.