Here is my own personal ranking of outlets. ( based on what I presently own).
1. Furutech GTX-D R
2. Oyaide R1
3. Maestro
4. Hubble from Audience
5. Synergistic Tesla SE
1. Furutech GTX-D R
2. Oyaide R1
3. Maestro
4. Hubble from Audience
5. Synergistic Tesla SE