Recover from a failed RND4000

I have an old RND4000 with 4 drives in it (3 RND4000's actually).

The PS died on one of them and the NIC died on another.

I moved the PS to the one with the good NIC, so I have 1 fixed OK, but now I have another with a bad PS and a dead NIC. There are 4 1TB drives in it and I cannot recall if they were set to RAID5, RAID6 or RAIDX (I know for sure it is one of these though).

If I moved the 4 drives to a newer model, will it be able to detect the RAID configuration & recover so I do not lose what is on these drives?

Any recomendation on which newer model NAS to use?