Another one worthy of a look is the Sig Sauer P290rs (be sure it is the "rs" model, not just the older 290). 5.5 inches long, about 4 inches high, 1.1 inches thick, comes with one 6 and one 8 round magazine, night sights, true DAO, for around $500 or upper $400s. It is a tad heavier than most polymer pistols in its size range at 20.5 ounces because of its steel sub-frame rather than aluminum.
I bought one after a lot of research and am very pleased so far.