I need the sound speed, punch, driving, attack, dynamical, large and deep soundstage, transparency, lightness and naturalness.
I have owned both of those fine preamps at one time. The problem is that they both have something different to offer. The ARC Ref 3 will give you the speed, attack, transparency and lightness that you are looking for. The BAT VK-51SE will give you the punch, drive, dynamics that you seek. They both throw a large and deep soundstage and could be called 'natural' sounding.
Only you can decide which direction you want to go in.