Would it muddy the watters too much if someone suggested using the GURPS: PRime Directive rules instead, if you're familiar with GURPS?
GURPS:PD is well written, and would avoid having to learn a new system. I also find GURPS very flexible, whereas (IMHO) ICON and CODA are better suited to creating characters that one would "expect" in the game, as opposed to unique concepts.
On the other hand, CODA is very well done, and if you need to learn a new system anyway you may as well go with CODA... it will also keep you from having to convert future CODA products to GURPS, tho I understand that they are coming out with GURPS:PD supplements as well.
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General George S. Patton, Jr.