Looks like a big bore Texan has an 490ish cc air tank/cylinder. I think a smaller pump will work. The Nomad 2 will fill a Marauder (215cc) from low to high (3000psi) in about 4 minutes. Same to refill my Daystate Regal (162cc) to 3500psi or 250bar. I am going to try to fill a Daystate Red Wolf when I get it and that cylinder is about 500cc, which I think is equivalent to your Texan. I was told by the Daystate vendor (who also sells the Nomad) that it will be fine. I think I can fill it in 12 - 15 minutes, but will stop the fill after 10 minutes and let things cool, then resume to top off.
That Omega Trail compressor looks pretty good too! Downtime without PCP air is a drag so maybe I will get one for a backup. I have a large carbon fiber fill tank that I was taking to the scuba shop every week where they filled it for $15. Took me an hour to drive there, then wait and drive back. Then they would shut down some days due to excurcsions and it got old fast. So a compressor is very nice. I can fill my current rifles in the time it takes me to load 3-4 magazines (10 pellets each).
Good luck and let us know what you end up with and how you like it.