Skip the original SSX. There's no point while Tricky exists.
I'd happily take remasters of Tricky and SSX 3 though. The latter is one of my favourite games ever and even though I loved the 7th-gen SSX game, it didn't have that same neon-drenched; heightened reality feel that the first 3 games did.
I couldn't get into the one from last gen. It was too serious or at least it presented itself that way. I I got it on day one and logged in probably less than two hours. I should give it another try.