Greetings fellow explorers,
I will share my two cents with the OP. I'm currently exploring in my Cobra some 2,5k ly from Sol. On my way to Hubble nebula.
Weapons: none.
FSD: A class
Scoop: B class, wanted A but ran out of Cr.
Everything else: D class, D is always the lightest version.
ADS (scans whole system - no range limit), DSS (more Cr to your pocket).
I have fitted shields too, in case I will fail escaping interdiction; and field maintenance unit...well you never know...

. but it looks like I will not need the AFMU, hull and all modules at 100%.
And that's all.
Oh, one important thing: Before you jump always check the next system for binaries (stars could be very close to each other sometimes), white dwarf, black hole, or neutron star...these could be a bit tricky...during the jump put throttle to zero (default key - X).