Nice ones! There are a few I haven't had yet. The "Diepte" is a heavy one too. I haven't seen that one from 't IJ before. I thought "Columbus" was their strongest beer.
I recently had the Piranha which was very special. Not comparable to any beer I know. I also had the 'Kraken' (blond) from the same Brewery which was also special, but very nice as well. And with red orange and kiwi a very unique beer.

Enjoy!