Lets See ...
Since you are on Windows machine I will remove FileMagnet and OmniFocus
(those are probably my two favorites but it helps having the Mac client for them
)
NetNewsWire (!! - quick access to all the sites you need for free - read more opens the site within the app - so especially on edge can speed up your web browsing time
)
Sketches - this application was created during the jailbreak days and the new version is twice as good as it used to be and is a simply incredible application for drawing and graphing and doing well Sketches on your iPhone
Trism - is well a fantastic game that I am constantly playing when I can't play SMB or some of the other more intense games that need constant attention, it saves so you can come back to it and well just a little amazing gem of the AppStore
SpeakEasy - if you need an audio recorder - this is the one to get! An incredible 1.0 release with many more features on its way such as customizable groups, sending files off the phone to your computer and many more on the way! - So great developers with a great map of where the software is going
WeDict - another from the jailbreak days - a simple FREE dictionary for the iPhone
Shazam - free yes, but incredibly cool - fun for demoing how amazing the iPhone is and a good app for just identifying songs you like but have no idea what they are!
BeatMaker - is well incredible! - Music creation on the iPhone has never been so well easy and fun and powerful - this is a detailed app with a lot of depth and a bunch of incredible things coming in the future!
Those are my suggestions of what you should get (OmniFocus is incredible btw!! - for those Mac users reading!)