RAIDZ1 or RAIDZ2?

I need someone to be the voice of sanity here Im currently expanding a 4x2TB RAIDz1 to 8x8TB with the intention of it being used to store a bunch of ripped Media from a huge collection of Movies and TV shows me and my partner have on DVD along with a small amount of Ebook and File storage.

Trouble is i cant decide wether to stick with RAIDz1 or Backup up the data and rebuild the entire thing as RAIDz2 What would you guys do?

For reference right now theres just over 1TB stored but i have only ripped like 5 shows and 2 movies plus a load of digital manga i have

Also its probably worth noting ive picked up all these drives second hand at about £240 for the lot but my intention is to replace them one by one with brand new as and when they fail (seems 8TB SAS 7.2k is about £200/drive so didnt fancy £1600 in one go)

Edit: Looks like you lot have helped me already, RAIDZ2 it is. Gonna get the last few drives formatted (Damn protection=1 flag...) make a Stripe array out of 2, copy the data over, Convert the other 6 to Z2 copy back and extend (somehow i feel like this is gonna take days...the format alone will take 24 hours 😂)