I haven't listened to the NuForce Amps, but I do still own a pair of Bel Canto Ref1000 Monoblocks, which is another very promising Class D Amp, and has always been favorably compared with other top Class D Amps.
Having owned a VTL Super Deluxe Preamp, as well as having spent some considerable time listening to the VTL 225 Monoblocks, I would definitely have to endorse the VTL's on this one. No Comparison!