try that sierra oktober man, shit is tasty, not too matly sweet.
des you should try some other shelf gueuze first before Cantillon, many actually think it's on the lower end...of course im happy to help out by sending you some, if you cant locate any of the following, and even if you can locate them i still got your back haha
for me id say
Drie Fontenien, Tilquin, Girardin Black Label, Hanssens Oude Gueuze, and Lindeman's Cuvee Rene are all typically better than Cantillon 100% Gueuze, and all except the 3F and Rene, have great distribution throughout the country.
Also wouldn't hurt to try the ones regarded as not as good as Cantillon but still tasty and available, like the St. Louis Fond Tradition, Timmermans Oude Gueuze, Oude Beersel Geuze, Boon Oude Geuze etc....
and holy shit at that Loon haul! nice work! Has my back hurting just looking at it, dear lord, did you bring any clothes with you to Brussels or just an empty suitcase??? cheers!