?? 5D or 5D MII ??

Hi,
I have two cameras : 5D and 5D MII.
Both makes excellent pics.
I must have only one camera. I thinking to keep 5D.

I have :
28-300 L
70-200 2.8 IS L
100mm macro
50mm 1.8
24-105 f4
28-135
The pics from 5D is much sharpest then from 5D MII.
Is it good or bad idea ????
Regards
--
Vtek