Boxes should be targetted at providing a large, "core" force, and should preferably be purchaseable a couple times over. OS is on target with the species, I'd revise it to:
20 Warriors, 3 Hoppers, 1 Tanker
Contains the "core" bugs, 700 army points, combined with Box set you are 1000 Bug points. People can buy this set 3 time over before they hit an upper "host" limit on the Tanker. Price normally $127, get this down to the magic number: $99.99.
There could also be a "reinforcements" box set of 3 spiders, 5 fries, 4 ripplers, and a Plasma. 510 Army points, again this set could be bought 3 times over for a single "host." Normally $125, priced down to $99.99.