The Herc GTXP is not just a Santa Cruz with a breakout box. The use the same controller, and that's it. The SC output amplifiers are of much higher quality, and the SC's drivers are more refined. I also was not pleased with the build quality of my GTXP's box, the knobs were loose and the headphone volume made static bursts when you adjusted it. I had one of the early ones though, so maybe those issues hav ebeen fixed. If so, it's a nice choice if you need a box. If you don't need the box, I'd get a Santa Cruz or a Philips Acoustic Edge.