CM or PM would be the same size as your covert with a little shorter barrel.
The P9 would be the same with a bit longer grip.
Like dustnchips suggested, kind of need to know the game plan. If you can pocket the covert I'd probably go for a larger belt gun.
If not the PM or CM9 would fill the compact mode. I don't pocket carry and don't care for it myself but many swear its the way to go.
In Memory of Paul "Dietrich" Stines.
Dad: Say something nice to your cousin Shirley
Dietrich: For a fat girl you sure don't sweat much.
Cue sound of Head slap.
RIP Muggsy & TMan
"If you are a warrior legally authorized to carry a weapon and you step outside without that weapon, then you become a sheep, pretending that JOCKO will not come today."