well for me I'm a very big fan of Pokemon... just think, if YOU had all legendary Pokemon cards including the three... but anyway, I choose Suicune. Go Water!!!
Raikou is awesome looking as well as tough. Since it's electric its only weakness is ground although electric type attacks aren't very effective against grass, grass isn't strong to electric. There are only 49 pokemon out of the 517 known pokemon that are strong against Raikou. That's pretty good. Not Sableye or Spiritomb good, but good. Raikou could thunderbolt Suicune and probably one hit k.o. it. Entei would be harder, I think it could go either way.
I also think Suicune is really beautiful, and Entei's pretty tough and cool.
Entei has amazing attack power . I love how it's power took down Zoroark with all that blazing fire behind . Suicune has strong defense and special defense, which can take alot hits . And Raikou, Unlimited electricity . =D It defeated that Gem that absorbs electricity . AWESOME !!