I dont currently rate Strootman. IMO, if we bought him today, he would not be an upgrade. In 6 months it might be a different situation.
Vidal - I've seen what he can do. But the video which I can't get out of my head is the one where a midfielder is breezing past him, and he goes onto score, running from his own half. It was like he was running in treacle and he basically gave up the chase. Evra gave him a puzzled look as if to say, "You gave up that easily?". Vidal was giving the impression of player in his late 30's. He would definitely struggle for pace, in the PL.
The funny thing is that whoever we are going after, seems to be recovering from a career threatening injury. Falcao. Strootman. Vidal.