I am using a Predator amp and I have tried others but keep coming back to the Predator. I also read in a few places that the LX was a little bit better sounding than the DACport with the Amp, but it is true that it would simplify my system to have a single DAC/amp. If I really like the LX, maybe I will try the DACport sometime and consider simplifying. A while back when I was using a computer as my source, I had a Pico and a Predator and kept trying to decide which one I liked better. Finally, I came to the conclusion that I liked the DAC in the Pico and the amp in the Predator, so I kept them both. Then I went to using a Hifiman 801 so no longer needed the Pico, but still fed the signal through my Predator. Now I am using my Nexus 10, so this may be similar in that I am back to having separate source, DAC and amp.
I may someday also try the new HifiM8 for a simpler setup, but as far as I can tell from their website, the DAC in that will require special drivers which may mean it will not work with the USB app for Android.
I use my system as a movable and completely battery powered system, but I do not try for completely portable as I do not travel much, so I do not mind the extra cables and pieces of equipment. I like to strap it all down on a padded laptop desk so that I can easily pick it up and take it outside or into another room. And when I do travel, I will just take the Nexus and my REO iems. Works for me.
I feel the same way about my RSA Predator, this is the one piece of gear I will not get rid of. I've came close to doing it because it wasn't being used as much, but I always find a new use for it. I have the Dacport, and at times wish I had the Dacport LX so I would have to use my Predator with it.
BTW, before the Dacport, I had an HRT Music Streamer, and found that it paired very well with the amp in the Predator.