Enrique has had a knee problem and has has injections to try to ignore it. Even if fit he is positionally a liability and has thus far done little for attack or defence. He only gets out of situations that he creates due to his speed. He was always caught on the ball at newcastle and that has been the same with us. I think he is our best option but is a link that need strengthening.
Suso is never a Messi type player. Is you watch Messi he is amazingly quick with the ball at he feet. Suso is an amazing technical player but he ain't going to skin anyone.
Falcao would not be interested in joining a team outside the champions league, so its not even worth mentioning the ridiculous fee it would cost in transfer and wages.
If we did buy another top striker, where would that leave suarez. His only real position is upfront so it would be like shooting ourselves in the foot, and keeping two big players happy with only one position isn't going to work.
What we need is a winger who can also play as a forward if required. The formation is not strictly 2 widemen and a forward but the wide players are someone who supports the front man and scores/creates goals (pedro, iniesta, messi).