I really like my CEntrance HiFi-M8 to amp my T5p. It works well with it and my HD 800. It should go without saying it has more than enough power for the T5p. When I get my modded headphones back (took the opportunity to put HD 800 connectors on there since my jack broke after 4 weeks with these headphones as new) I'll use XLR 4. I like the selectability of that amp to do a bit of EQ, but I usually just leave it flat. The battery is great and matches well to my use case.
Edit: 100th page!