Sig's are great but they're addictive! I'd recommend the Sig route as well though if it's too pricey Taurus makes some nice DA/SA guns expecially the PT945 and similar.
Ruger DA/SA (e.g. P95); a bit "blocky" for concealment, but possible and they are reliable. For a little more, a Ruger SR9c or Sig 2022. FNP-9. For even more, a Sig 225 or 228.