I think the difficulty is in figuring out the value of your Kimber versus the value of two Glocks.
The other factor is letting your desire influence your decision. If you want 2 Glocks and don't want a Kimber, you're likely to over-value the Glocks and under-value your Kimber.
If you look in the classifieds on Glocktalk.com and other sites you might get an idea of what the prices are.
I haven't looked on the site but ballpark I'm thinking those Gen 3 Glocks go for around $430-$450