I've heard one of Donald Fagen's solo albums on LP on an $850,000 system which included Avante Garde Trios, 3 pairs of Basshorns and 2 Rel Subwoofers. The deep bass was phenomenal (about the only thing I appreciated in that system). Sure it was summed mono below 50 Hz but wow was it deep below that. Yes, digital can have superior deep bass in stereo. My own system has bass down to 25 Hz with 6-12" woofers (room doesn't support the 13 Hz claim of the manufacturer). This is with either analog or digital. The OP shouldn't worry about bass quality with a VPI/SME combination.