It could possibly be a new production model, but since the black moon is strikingly similar, it probably was just a prototype. If you go to Drum City Guitarland, they always get new Syn prototypes that look similar to production models that come out.
The amp I use for metal is a Crate GX212, which I picked up used at guitar center for $100. Amp is pretty big and I can get a really nice Syn Gates sound out of it by default. I can also plug in my Uber metal pedal and get a nice classic sounding guitar overdrive. If you can find one I highly recommend it.