lol
Like you are a newb to painting and assembling plastic minis!
Oh, you mean playing? Haven\'t played since about 3rd edition, so don\'t know a thing about the new rules.
Don\'t take your finished army into a store to play that you don\'t know the people well, or you might just be taking a bitz box back home instead of an army.
DON\'T buy a marine army codex, until you are sure which army you want to run. Just get used to the main rules first in the boxed set.
Get a retractable sting device for measuring movement. Laser pointer works good for LOS.
Then again if you want to go crazy modding, you could equip each member of the army WITH their own laser pointer sight for LOS. lol