For brass and guitar amps I'd generally reach for a dynamic mic first (AKG D5 is a good budget option), for acoustic guitar and voice I'd probably reach for an LDC (unless your budget stretches to an Aston Stealth or Shure SM7B). The Audio Technica AT2020 is pretty hard to beat in the UK but I don't know how the prices stack up over there.
The Behringer UMC interfaces offer a lot of bang for buck, they've not been around long enough to really talk about durability or driver support though. I've got a focusrite on my desk that I reckon is over 10 years old and still going strong, it's also still getting driver support from Focusrite.