'Good enough' is rarely good enough for SPL, as this thoroughly over-engineered preamp testifies!
Sound Performance Lab have developed an enviable reputation for their hardware products, and now you can buy more for less with their modular rack system.
This mic preamp and processor is about as flexible a device as you could hope for without taking the modular route — and all in the space of a 2U rack.
A Channel One without the valve for little over half the price? Seeing (and hearing) is believing.