Help choosing app for GTD (IOS + PC)

[Ncage1974]

I'm in the process of reevaluating software for GTD because i've decided to switch from android to the iphone. I already have an ipad. I know the standard which everything is compared to is Omnifocus but Omnifocuses' cloud part is weak. I want to be able to manage everything from my PC (windows too. The current app i use on android (ultimate to-do list) is really nothing more than a glorified task manager. I want an app that is more closely aligned with GTD.

I don't mind paying for the app but i shouldn't have to pay $10-$20 per year for syncing.

The cloud version can be tooledo but it would be nice if they own (usually looks a lot nicer). Tooledo is pretty generic looking (especially the way some of these apps make a mess of things on the tooledo side) but at least i could be somewhat productive on a pc

Here are some of the features i would like:
Sync with IOS Calander / Google Calander.
Sync with IOS Reminders would also be nice.

Apps i've looked at:
"Action Lists" - Interface seems very good and app seems well aligned to GTD Principles.
Things - Like Omnifocus no cloud version.
Doit.im
ActionAgenda - this app seems really nice and has a nice price too. I really lilke how it integrates your task + Calender.
ToDo - looked like another glorified task manager

Any advice / help would be appreciated.

thanks....