do what you like urban, i never found a strain yet that didn't like being topped.
my spacebomb doesn't need to be topped but everything else i have ever grown does, unless i'm just running a simple sea of green style set up that is.
of my 12 blue pits i have;
2 great big dirty diesel phenos which must be topped unless you want it growing through your ceiling!
1 crazy ass og stlye plant with huge internode spacing and i would say that has to be topped too.
3 dwarf phenos that never really stood a chance in my configuration, they have always been runts that are in the shadows. one looks just like a dpq somehow
1 beast hybrid that looks very sativa in structure but finishes really quickly with solid buds and fantastic resin (keeper) this needs to be topped
2 deep blue dom hybrids that are a perfect balance of yield, resin and ease of growth(both keepers), you could choose to top them or not, they will still yield like savages.
1 plant is very short but even still has done excellent in my garden, it is all bud with great density and resin, this pheno would do well in a sog i feel.
1 plant is sort of an inbetweener, it has been on the periphery of the garden but still has nice colas, it didn't stretch nearly as much as it's sisters even though it was the tallest plant going in to bloom, could get away growing it without topping.
1 plant is, well, half dead if i'm honest, the equipment failure i had halfway through flower did some harm to all of my ladies but they bounced back, this one has lost the majority of it's fan leaves but the buds are still looking nice, i would say it was similar to the diesel phenos i have in structure but is a faster finisher, defo needs topping and could still be a keeper, we shall see...........
i grew all mine from seed so they do tend to stretch more and be less predictable than cuttings from the same plant. the next time i grow them i should be able to get it more dialled in.