Who do people think is the better option out of the Yak or Welbeck as a replacement for chico?

The reason I am thinking the yak or Welbeck is if I replace Hernandez with a 4.7m player I can get Evra in considering Man U's recent defensive form and their upcoming fixtures.

Do people think this would be a good option or stick with a weaker defence and opt for a better striker / midfielder i.e Suarez, Adebayor, Bent, Ba, Nani, Young. (Ps I cant afford Rooney because i ditched him for hernandez before last weekend so that I could afford Phil Jones)

Any advice would be appreciated?