Thanks everyone! I am leaning strongly toward the Focusrite Scarlett 2i2 4th Gen USB Audio Interface. It seems perfect for solo recording and provides room for a little more if I wanted to record a duet or 2-person convo like a podcast.

Sidebar question: To those of you like me who only ever record one track at a time, do you use the additional inputs mainly for the convenience of leaving a setup intact and connected?