dont worry about hydrolocking, but dont go over deep puddles on purpose. when i first had my installed, it rained really hard like 2 days later, and i was so being extremely caution. i had to drive like 35 miles on the highway, and i was freakin out. so when i couldn't take it anymore i stopped at a gas station and popped the hood, and the intake was completely dry. another time i actually hit a puddle because i was on the phone not paying attention, so i stopped at the gas station to see if it was wet. it was like barely wet. so the filter gets like barely wet sometimes, but it's not enough to do damage. go with whatever one u like. i picked the typhoon because im going to convert it in the winter time to see if there is a difference in power. im thinking it will accellerate more high end for the cai and more low end for the sri. i know the sri is louder than the cai.
laters