Go with MLO (my favourite tool)
I'd wholeheartedly recommend MLO
I suffer from "chasing the newest shiny tool out there that will solve all my GTD problems"-itis - invariably, they don't, and I've ended up returning to MLO more times than I care to mention.
I had a quick look, and you can do the 'Effort list' you mentioned - you need to set up a specific view for it. I can send you details if you go ahead with MLO - just let me know.
MLO has been a godsend for me, given its flexibility. There are still a few shortcomings, but having said that, there is an iPad App on the way, as well as improvements to the desktop version.
Afraid I can't comment on the Android App as I'm an iPhone lad - but my understanding from the little I've seen is that the Android App is better than the iPhone App.
Also - I should mention - I have no affiliation with the development team, just a very happy user
Hope this Helps....