I did not have any luck in a quick web search determining what variant of Wireless N your access point uses, but you should definitely try to match its throughput speed with regard to Wireless N with whatever device you decide to purchase. It does have MIMO capability, so look for networking adapters that support this feature, along with dual-band, as this device has that also.
I won't be of much help here with brands, as I have used all sorts of brands, and have not really found any one all that much better than another. I am also generally using a USB device for a laptop when an internal card fails, so size is important, and nano-sized adapters are my preference. I have found them to be awfully good at picking up a signal in the vast majority of settings. They also are generally quite inexpensive.
I've generally purchased from Amazon or eBay, as I'm a price-point shopper within whatever technology arena I'm shopping - and it's easier to do that sort of shopping in those venues.
