I had to face the same decision point a few months ago, and I ended up going with the 1ET400A eval-1.
VTV AMPLIFIER Purifi Eigentakt Stereo Amplifier based on EVAL-1 | VTV Amplifier
There is only one reason for that, that amp has the best bench test measurements among the Hypex and Purifi amps as you can see in the thread I linked earlier. I would have preferred the 5 way binding posts and the ease of replacing the input buffer with something different that they "standard" vtv Purifi 1ET400A amps with choices of several input buffers they offer.
Realistically though, I would likely never bother trying a different buffers anyway as I do not believe in those different sound signature difference claims by audiophiles. For the believers they should stay away from the likes of the Benchmark AHB2, Hypex and Purifi amps that are all designed to be transparent.
Trigger would be a good feature especially if you plan on using it with something else such as an AVR or AVP.
View attachment 53411