What style windows should this House have?

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I purchased this house to flip and will be replacing the windows, should I use windows with the white grids or not? Also what would you think I could add to the front/yard to improve curb appeal?

Thanks

pic attached

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http://www.facebook.com/photo.php?fbid=512814154917&set=a.512814045137.2014374.75600909#!/album.php?fbid=512814045137&id=75600909&aid=2014374

if you can get that that album or photo, you'll see the windows i used in front were sliders and i think they looked good