Those who have tried this both ways report that fuses sound better than circuit breakers. Unfortunately those good old threads from Redkiwi are now gone from the forum archives. Ceramic-base fuses do sound much better to me than glass-base fuses; there really is a big difference in my rig (which is a bit *too* revealing) so these subtle changes are all readily apparent. The new plastic base fuses seem to be OK too, although I haven't done a critical listening comparison between them & the ceramics.
I had to go with the new plastic fuses only because I cannot find the ceramics anymore. If anyone has a source of ceramic 20 amp round "edison base" fuses or has some available for sale then by all means please drop me an email.
In any case, take the time to polish/burnish brightly all of the metal-contacting parts of the fuse & socket. Crocus cloth does very well at this job but an ink eraser will work OK too. Then use a good contact cleaner (Kontact) on all conducting surfaces prior to assembly, including the wire ends themselves. Polish up your AC cord prongs while you're at it; makes a difference believe it or not. Be sure to power off so you don't get electrocuted!