For day to day pentesting purposes, any modern laptop should to the job, as long as you’re able to run a virtual machine (to either run a kali/attack vm, or to reproduce an environment before running an exploit).
I’ve used an Asus Zenbook for the last 5 years for personal security purposes (ctf/vm mainly) and it was almost perfect.
Now comes the password cracking part. Having an integrated nvidia 1YX0 card in your laptop may be useful in some situations where you need to crack some hashes on the go, but for serious cracking you should consider using an external cracking rig 
I have the following:
- CPU i7-7700HQ
- 32GB ram
- 500GB SSD + 1TB HDD
- NVidia 1070
It’s a 15" screen, but it is really a 17" package, so it’s a bit heavy.