Foam doesn't do much for the bass and midbass. It would not be too reflective it would absorb too much of the high freqs. Auralex stuff isn't that great either. If you want good bass trapping go with OC 703 fiberglass or some use rolled insulation and roll it in a cyclinder (larger the better, to a point) and stack them in the corners, 16-20" seem to do good. Memory foam is going to be more expensive than the insulation and fiberglass.