IF you haven't found your Aptus 12 back yet, I have an Aptus 10 that I will be selling. The Aptus 10 sensor is actually longer than the Aptus 12, though it does have lower resolution.
Unless you need to make prints much larger than 40x60, the Aptus 10 may offer substantial cost savings over an Aptus 12.
Thanks,
Drew Harty