Step 5 hand

[JasonP530]

Step 5 on pokerstars. Buying is 700. Down to 3 handed. Top two move on and 3rd repeats

SB had been playing back at me agressively to both of our detriments earlier, but has calmed down as we get to 4 handed. BB has been pretty tight.

Sb has 7k. I have 4k. SB has 2k. Blinds are 150/300 with 25a. I am on the button with JJ. Shove or raise and fold to a shove from SB?

What range of hands should I be shoving/stealing(folding to shove) with?

Thanks,
Jason