Let's say you are READING AT THE MOMENT, but you are PLANNING TO PLAY a computer game (Starcraft).
1) 'I just have to finish this article off first before I play Starcraft.
2) 'I just have to finish this article off before I play Starcraft.'
NOTE: Google said, ''finish off'' or 'finish sth off' is the last thing/activity you want to finish before you do another. BUT, as you can see I have included ''first''--to add clarity stating the sequence of my action. Although I am not sure, and this is not based on grammar rules, because I haven't come across this one yet, that is why I am asking.
Which is more grammatical #1 or #2?