Please suggest the best solutions in the market for breach detection, and network forensics like SS8 BreachDetect.
We use Darktrace and are very happy with it. It detects unusual network behavior based on you normal network activity. Great for insider threat and APT and lateral activity.
Have you ever thought about deception strategy? It is non intrusive exploit/vulnerability agnostic approach. Look at the TrapX Deception Grid/Attivo/Illusive/TopSpin etc.
RSA NetWitness® Suite
I'd look at Dark Trace and others like it.