They are a great band, but I would not call them Texas Swing. That sounds like Bob Wills and the Texas Playboys, Asleep at the Wheel or maybe Spade Cooley. The Spankers music is closer to 1920's jazz; verging on jug band music (which I'm a big fan of). Great stuff and and very fun.
A'Goners will love their commitment to great sound. Whenever possible, they play totally acoustic. No sound system whatsoever. When they have to, they use a single vintage mike. One of their releases even starts with a plug for people listening to them on CD to buy more vinyl.
I saw them live a few months ago, and would caution that their live shows can be pretty risque. Lots of references to sex and drugs; something I hadn't remembered from seeing them a few years ago. For one song that was requested, they said they could only play it if a parent in the audience took his young daughter outside. After hearing the song (and almost falling off my chair with laughter), I fully understand why. And they had us cheer for the daugher when they re-entered the building. It was a very entertaining show.