Got the Therion as my first DNA device, and I'm still not happy with it after a few weeks, I'll have to sit and make more adjustments.
It's a wonderful device in looks and quality, but will be my first and only DNA mod as far as I'm concerned, the amount of work to get the settings just right is ridiculous.
I've seen the Primo, lovely device, but issues with V1, so if you go with that one, make sure you get V2. The thing I didn't like was that it's just too small in hand for me.
I decided to go with the Wismec Predator (which I've read that may be using the same chipboard as the Primo but is simply more comfortable in hand, no issues with the 510 reported, larger screen and other items that made me go with it). I'm eagerly awaiting to received it. (but saw it in stores and was able to check it out, would have gotten it, but they only had the kit and I have no interest in the tank that comes with it)