anyone have opinions of this sub?

it would be in a small living room paired with m22's, vp150 and qs8's. Im thinking that due to the smallish size of my room plus the fact that its an apartment, I might be able to save some money and get a smaller sub which would allow me to get the vp150 centre over the vp100.

anyone have thoughts on this. or am I better just getting the bigger sub and keeping the gains down?