Keep The Kimber
Greetings AA,
Here is my take on your question. Certain brands are basically 'top shelf' representations of their class of weapon. Kimber is an excellent brand and their products are of generally fine quality. I would not 'unload' (no pun intended) any firearm that is not cursed with some sort of fundamental flaw that 'eats at you soul'.
Controlling a .45, for many people, is just not as easily done as with some other calibers. This, however, is NOT a flaw. With proper practice, you would be able to shoot the .45 more accurately. Futher, you will find the value of quality guns always rising. If you sell the Kimber, and later decide you want a .45 again, it will cost you more.
My advice is always buy the best possible quality that you can afford (sometimes even more than you can afford is OK), keep the guns (unless they possess serious design flaws), and enjoy your growing collection. Over the years, I have purchased and parted with many fine handguns. Today, I wish I had a goodly amount of them back.
I hope these thoughts help you reach a decision.
Best wishes,
Bob