I had the cobbs street cams in my car and loved them. Good power gains for sure. I have a cobb intake and have no problem with water at all, unless you are in water up to your wheel well, you shouldnt have a problem.
I switched to cobbs racer cams which are more aggressively ground for N/A only...they also make power way past the stock redline (8,500 rpm.). Idle quality suffers...nice and lumpy!