Agreed, my next time will be a RedSea or Waterbox. I went with IM this time but only because I was in a semi-rush (that ended up taking a year to do anyway.. ) and didn't care to look into it that much. I'd have gone with wither of those had I done my research. Nothing wrong with IM, I just like the setup of in stand sumps more than AIO.I didn't go with either on my upgrade, only because of the tank size. I did struggle with not going with the Red Sea 900, but ended up going custom. Both tank companies are making some awesome tanks.