Of the 2, go for the Plinius ,IMHO, for the following reasons:
- More power
- More air around the notes along with large soundstage and great dynamics
- Better resale value
In long term listening, Simaudio amps tend to sound a little dark, foreboding, "solid state" (steely?) and conveying less of the music emotion. YMMV.
However, if you can wait, Plinius is due to ship their new 9100 (120W) and 9200 (200W) soon. The amp circuitry is based on their new Odeon...And while you're at it, contact Totally Wired in NZ for the Slinky Links silver interconnects. Many people who have heard them together think that are a match made in heaven.