I love Orks. I had a fun time with Tau and IG, but good god I
will never play another army after Orks. I can't say my advice is
the best, but I can at least offer my opinion...
Your list looks good, really. Out of the first list, I like it,
'cept for the Squigs. I like Squigs too, but I've never actually
done anything worthwhile with them before... Oh, and please don't
be that guy that gives your Flash Gitz any Blasta Snazzguns.
I don't think you need any Nobz, Grots, or Kommandos. Especially
Kommandos, dey is not real Orks.
Killa Kanz are actually pretty good. Obviously not as good as a
Deff Dred, but the difference isn't so large as to spend 40 more
points for a Deff Dred IMO.
Other than that it looks good. My favorites are the Looted
Vehicles (and I think they all have the same stats, I believe),
Weirdboyz, and a SHIT TON OF TRUKK BOYZ!
It has been about a year since I last played though. Things may