9 mm gun, what to get?

For my daily carry I have been carrying a Walther PPS .40 for 6 months now and love it!! it is the thinest thing on the market, I carry it unholstered in the waist band for up to 8 hours a day I some times for get I have it. Yes I even where it in my paint booth or under the lift. I have had them and still have most (LOL) a .45 is by fare my favorite but uncomfortable to daily.