I'm only about only 60 gants, 8 stealers, and 4 elite-types into my Tyrannids, but these beasties are a friggin hoot to put together.
Coming from Necrons, the pose variability is off the chain. And 4 arm-sockets that fit everything (so far as I can tell)? Conversion Valhalla. I haven't even touched any of the big boys yet
The number of models needed to make points is pretty daunting, but at least its fun to do!