For Belgians I'd recommend keeping WLP500, 530 and 550.
This!
In my club, the 500 and the 550 strains seemed to do well in this year's intraclub Belgian Ale competition.
My understanding is that the first-place winning pale ale and dubbel both used the 550 strain.
WL500 = Chimay (WY1214), WL530 = Westmalle (WY3787), and WL550 = Achouffe (WY3522) yeast strains respectively.