They are all so amazing, its incredibly hard to decide. I'm leaning towards Wolverine right now though, its probably my cheapest option.
It's not certain if HT will release a new Wolverine. They might do it, they might not. If they do, it will either be of the new film or the older films. Whatever they'll do, it's not gonna be this same design.
If you really like this Wolverine, I'd say go for it. If a possible later Wolverine turns out better than this one, you could always sell it.
Just choose the figure you like best at this moment. If you decide to buy another figure just because Wolverine might get another figure sometime in the future, you might get regrets later.
Like I said, just choose the figure you like best!
Good Luck!