Encouraging signs here from 'Englishmen' Morgan and Trott. With SL's dodgy middle/lower order, batting under lights, dont underestimate how hard chasing a 230/240 could be. If these two stay in for a bit, and Prior/Wright/Bresnan have a bit of a swing we could be looking at a touch more than that too.
I would have taken the powerplay at 40. They either bowl Malinga and use him up, which mean even if they get a few wickets, the lower order doesn't have to hit Malinga in the death. Or they save Malinga and you have a good shot at picking up some good runs in the powerplay.