I see you are a relatively new player so I'd like to point you to the
Gk thread.
http://www.dakkadakka.com/dakkaforum/posts/list/460371.page
6th edition and
gk changes/tactical thread.
You can post list and ask question in here on the basis of
Gk and I believe that just by reading the post you will gain alot of insight
on making
gk list, what works, and battle reports as how to play some list, that look similiar to how you want to go about playing.
If you want more direct questions, just continue to post here and I or hopefully someone else will answer them
as for what your post... It seems you definiely have a variety of
GK stuff to choose from. so to help you on your quest of where you want to go
do want quality or quantity?
would you consider allies?
fliers or no fliers?
vehicle spam?
shunt army?
pali, termi, or strike squad based?
from there how do want to handle coming up against
heavy psycher armies
heavy flier armies
heavy ap2/3 armies
heavy str6+ armies
heavy
MC armies
vehcile or biker spam armies?
finally
what units do I really want in my army?
can I get these units in the same list and still be competitive/ how competitive do I want to be?
If you can follow this and answer these questions you are well on your way to building a list
I don't usually like to point out "you want to run this, this, and this, when you have this guy."
People think differently and a large part of
40k is creativity. If you can come up with something that others haven't thought about
and it works by all means do it... so for that reason I'm not going to steer you in a direction as to what you should or shouldn't take.
Decide on how you want to play by the basis foundation of what you want to play... not by what others suggest you play.
Hope this helps