If you want to be very defensive oriented then those two styles are very good. If you have deflect arrows as well you can negate one ranged and one melee attack each round and on the following one gain a huge AC bonus dues to Snake Style (assuming you push Sense Motive).
are you actually headed for the duelist prestige class? if so, the crane feats might be less attractive since they replicate the duelists parry/riposte abilities (the feats are better, frankly, but you might not want to spend them if you'll get class abilities anyways).
also- snake style lets you deal piercing damage, which means you can use unarmed strikes for duelist abilities (like precise strike)... depending on your build you might want to avoid sacrificing flurry because its an easy way to get an extra attack (which is really useful for a 1hand weapon wielder, whose damage naturally lags behind 2handers and 2WFs)