I cannot decide between the kahr K9 or the P9. I primarily want it as a house gun and as a sidekick to protect me on my trips to the local stop and rob. They both seem to have some advantages/disadvantages. My main concerns are with lifespan of the gun, rust resistance (I live in a very humid area), and reliability/dependability. I have read the various reviews (yes all of them!) of the kahrs that they have posted at their web site. They both seem to get very favorable reviews. My issues w/ the K9 is that I have read in some recent publications that stainless steel is very prone to rust or corrode in storage. And since holsters and gun safes attract moistiure, this could be a problem especially where I live. 2nd, I know that the K9 weighs more and that most people like the P9 who carry concealed more often. I know that the K9 probably kicks less due to the heavier weight, and since i'm not going to be carry concealed all the time, this may not be an issue. My main concern w/ the P9 is the polymer frame lifelong durability. I know that the polymer will resist rust and sweaty palms , but how will it hold up under a lifetime of firing round after round of ammo? I know that the polymer frame is reinforced by steel inserts, but it still doesn't seem like it would be as strong as a steel frame. I guess I could have just summed all of this typing up by simply asking which one of these 2 guns (the K9 and the P9) is better suited to be more reliable/dependable, resistant to rust and corrosion, and have a longer lifespan or service life? Thanks in advance.