iPhone SDK for windows. Which one?

I am between those two SDKs for windows

http:/开发者_如何学编程/www.dragonfiresdk.com/index.htm

http://www.airplaysdk.com/

Has anyone used them before? Which one to buy?

After lots of searching and testing I think I'm going to buy a macmini and write my apps in Objective-C. Actually all the solutions out there need XCODE. I've found though some good frameworks and SDKs for windows and for coding using your web design skills:

• ELIPS STUDIO 3
• PhoneGap
• Appcelerator

Maybe Unity?

Note that http://www.apple.com/macmini/ is less than Airplay Pro…