I sold the Warlord titan I got extra from Mail Order and put the money towards purchasing one of those humongous hard-plastic cases from GW, twice the size of the normal cases. Call it impulse purchase. The large case I use for the chaos army is always straining under the pressure and I never feel 100% sure the models aren't breaking in there.
I'm planning to downsize the black storm a bit, getting rid of models I never use and probably will never get around to painting. No hurry though, I need to get the Lost and the Damned out first. Time to bug Lawrence and see if we can make some headway there.