Before you buy, the tf7's not a bad gun.
Seems to have around 280-300 fps, foregrip and stock are excellent. It has a good rof for its size, about 12 rps (720 rpm). But, it is your choice, I have heard a lot of good things about the kraken
"You can go a long way with a smile, but you can go a lot further with a smile and a gun."