I have the Corus and new PSU as well. I think it is superlative, but FWIW I don't think bass definition is its strongest suit. I would be very curious about the 7.5 mkIII as it was my other top choice before going with Rowland. Pairing it with my 625 S2 was a natural choice but I am still wanting to hear the VTL.
VTL 7.5 S3 vs Jeff Rowland Corus with PSU
Currently own the Jeff Rowland Corus with larger PSU power supply and am considering a VTL 7.5 S3 preamp. Anyone hear both and able to comment if this would be an upgrade or side step. Speakers are Wilson Sasha DAW with Krell FPB 300c.