Hi Ozzy, Not sure if it can replace your preamp. We played it through our clubs Genesis I-60 integrated amp, into Genesis G7.1f loudspeakers. It seemed to have less gain than the clubs Oppo-95. Depends on how much gain your amp has, input impedance, length of cables, speaker sensitivity, etc.
A lot of the members really liked it. It does depth really well. I thought it was a tad soft sounding, and could be a bit more extended in the treble region. It was really easy to listen to. Very smooth with no nasties at all.
As with anything I would try to demo it in your own system first, if possible.