Only concern about Sissoko is since his shoulder injury/operation he hasn't been as effective, but it probably doesn't help that he's not played as much with Mascherano arriving. I have a friend who supports Liverpool and he's always said he's the "next Vieria" which naturally I used to laugh at, and of course my laughing was vindicated when he said the other day they should sell him, which sort of validated my opinion he was just being a biased little scouser. But he iss a good player, certainly better than Butt (and younger, obviously) with Premiership experience. Get him in, if attainable.