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GURPS could be okay (with more attributes (i.e. character diversity) it could be my first choice). The HERO system ... I'm not sure if this is really supposed to be a RPG system, or an instruction on how to build a cold fusion generator. ;) Don't get me wrong, I like science and complex rules, but the HERO system is definitely not something to play out of the box, and learning the rules as you go is equally impossible. Besides, it's geared so much towards the superhero genre, that the mundane parts are a little bit lacking, compared to other systems. From that viewpoint nothing in the book jumps you in the face an cries FUN. :)
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ICON did a great job, and CODA's ship combat is very, very good.
You can already do whatever you want with ICON characters.
I don't see any need for anything else.
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Um, there already is a GURPS Trek-style game, "GURPS: Prime Directive."
I hear the same folks will be putting / have put? out d20 and d6 versions, too.
And they actually managed to get a Klingons book out, and the line hasn't folded yet!