~.6 cubes sealed - shallow 12 or regular 8/10?

Im building 2 separate ~.6 to .7 cube boxes in the footwell of an 06 scion xb.

Wondering if I should run 2 12inch pioneer shallow ib flats, would be around 100 each

Or 2 sundown sa10s. Idk how well the sa will do in a .5ish box after displacement, but their site says thats the recommended size for sealed. Would be running around rated power as well. Down firing box.