I like my HK45.
My current favorites are my Walther PPS M2 (subcompact) and Sig P320 compact. Both are accurate, and easy to handle. The Walther has a lower round capacity, but is easier to conceal than the Sig. Looking at the Sig P365 SAS for another easily concealed handgun.
This is their USP Compact. Such a great carry weapon. Light, small, powerful, reliable; everything one needs. It's also very easy on the eyes and feels darn good in the grip.