I would pick for tonights game -
I think a better selection for today's match would be to replace tharanga with Atapattu. But only for today's match. This way you bring some pressure on Tharanga to perform. I think its wrong to replace Chamara Silva with Attapattu. Silva has already scored 4 50s in this WC including the one in the last match so kicking him out now would send the wrong signals and may even be de-moralising.