You might want some of Ross Enamait's books.
Ab wheels are awesome. Given your goals, you might want to look at sandbags. Also, hills and large automobiles (for sprinting and pushing). A Prowler would be awesome as well.
A second 24kg KB might be nice as well.
But look at your goals:
Looking X (strong, ripped, etc.) = diet
Feeling X: might be diet, might be strength, might be conditioning, etc.
Being X (besides ripped) is a whole different thing.
Decide what matters to you. If you want to see your abs, concentrate on diet.