Which ps4 is best for me?

First off I've never used this sub but I'd like to get a ps4, In Ireland Argos looks like the best price wise irl. Is the OG worth saving money and getting? Or is the Slim really worth the extra money as I've taken into account paying for monthly online subscriptions. I don't have a 4k setup. Just looking for help with the pros and cons of each console as online all I'm finding is sponsered links and unclear answers. Thank you all in advance