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I make the following adjustments to the default settings. Right click on the SizeUp icon on the system tray and click Preferences...,
Others
Hyperdock (App Store) - Has mouse snap feature, plus it allows previews of applications like Windows 7. Unfortunately for me, it is not viable on the iMac as it is missing keyboard shortcuts for predefined window sizes.
Better Magnet (App Store) - Also looks good too.
RightZoom - turn the green button to really maximize like Windows. Personally, on a 27" iMac I have never had a need to try this out. This link is for laptop users.