I've used all 4 products (and a lot of others). I think the two BSN products are crap. Size on gave me much better gains than cell-mass, although cell mass tastes better. As for the "superdump" moniker, Superpump250 got that name because the high amount of magnesium tends to lubricate some people's digestive systems. HOWEVER, NOExplode has about 3X as much magnesium as Superpump. It can tear you up for as long as the next 24 hours if you are sensitive to magnesium.
I'd stick with Size-on, and for your pre-workout drink, mix Superpump250 with Jack3d (half serving of each) for great energy, focus, and good pumps. Or take Plasmajet for pumps and Jack3d for energy, focus, and stamina.