75 cards is no bueno in my book. Remove the Samurai, imho. You don't need them, and if you're worried about the creature count I'm sure you can find knights to fill the gap. Take a look at my W/B knight deck if ya want: http://www.mtgvault.com/ViewDeck.aspx?DeckID=146958
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You've got some good cards, but you do realize you're all over the board with this deck. In addition you've got 5 Leonin Skyhunters listed. You need to make the deck more specific, you've got Knights, Artifacts and some life gain, and none really work together. Knight Exemplar is almost wasted as only 3 (sets of) creatures you have will benefit from her.
It's not my personal favorite, but my buddy who uses him says I should put Emrakul, the Aeons Torn as a nominee.
Here's the solution: Make it to where the Comment box has to have something in it for the vote to apply. (ie. Vote & Comment necessary). Then you could weed out the spam voters easily and keep the constructive criticism. Anywho...
I really like the theme to this deck. It also seems to have a good number of boomers with alternate ways to get them into the battlefield without paying for the high costs, or acquiring the mana to do so quickly and easily while boosting the little guys to effectively turn them into boomers. One drawback is that there aren't a lot of defensive spells, but I'm a bit of a noob and always build decks with some kind of defensive instants/sorcery. Good work! Theme-Deck Success. =D