I have the slammer 3 4500 and beat the snot out of it. Dunks, splashes, and its still going pretty strong after a full year. It is starting to show signs of wear...makes screeching sound when reeling. More annoying than anything. The drag still works good as new though.
Im actually going back and forth right now between the Slammer 4dx and VR. I've spent a lot of money on Penn reels though the past 2 years and think I might go with the VR this time around. I read a review from John Skinner somewhere and he said the only knock on the slammer 4dx is that it isn't fully sealed, great reel otherwise.