I'm of the opinion that (as the state of the art currently stands) the 49-ways will play better for all the 2,4,8,49way & Hall Effect games.
Currently available analog sticks, whether for PC or Arcade, tend to suffer from a long throw and light resistance, making for poor gameplay in games that weren't designed to be used with them. Now, Andy from Ultimarc has hinted that something is in the works, but how soon, or how well it will address these issues is not something we know right now.
There aren't really all that many games that need a true analog anyway, so unless you really want those games, I don't see any point in waiting.