I have the T5p and am looking for a top-notch portable setup as well. You asked for other TOTL portable DAC/amp combos, so here are some other ones I've looked at as well:
ADL by Furutech X1 (not yet released)
Although honestly, you probably need to list what your source is going to be. If you're using a laptop, it seems like just about anything will work. If you're using an Android device (like me), than your choices will generally be very different from those using Apple devices. At the moment, there seem to be more options available for Apple devices, but the number of Android-compatible units is growing pretty quickly.
So, what do you plan on using as a source?