If you do not have a well treated room, go for the HFT's first. They make the biggest improvements in rooms that have sonic issues.
HFTs or more fuses
I just put Synergistic Reds in my DAC and pre. My retirement budget only allows for my next purchase to be either Synergistic Blacks for my monoblocks or the HFTs for my room, not both. Can someone tell me, from their experience, which acquisition made the bigger improvement in their system?