The 807 PP monoblocks uses ~6dB of global NFB to compensate a bit for the low Q OPTs I'm using (salvaged from old PA amps), the 807 SE and 808 SE amps only use a bit of cathode feedback. IME the OPTs are the bottlenecks, not the cathode chokes.
I believe the guys in the MoFo thread get very decent results from using ordinary filter chokes and even microwave oven transformers as source loads in their mosfet follower amps. An OTL amp with several low parallel low Rp triodes would be closer to a MoFo than to a regular choke loaded gain stage, personally I wouldn't hesitate to use power supply chokes in a project like this.
If I felt I just had to spend money on more audiophile approved chokes I would take a look at Lundahls medium or high current range of chokes, they are layer wound and with split bobbins and should have very low capacitances.