Pokemon Platinum: Roserade or Leafeon?

1.) Roserade or Leafeon
2.) Vaporeon or Glaceon
3.) Jolteon or Luxray?

But I can't decide for numbers 1-3 HELP!

I know their stats-- Just what do you guys think?
Update: Ok- can you tell why? :)

Oh and by the why is Glaceon a good pokemon to have?
Update 2: Thanks for the Answers :)
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