Wireless N options for Studio 1535

I am upgrading my Studio 1535 (windows 7) to wireless N and want to know what my options are for wireless cards.  I have been looking at the intel 5100 and 5300 but can't find a source that tells me which is better and if they are definitely compatible with my computer.  I think I need one of the half height cards but I'm just not sure.  Also I'm looking for a good source to purchase the correct card from.