Dual Band N PCI Adapter?

[Aaron11]

What's a good dual-band N PCI wifi adapter? I've been looking at this Linksys WMP600N adapter that goes pretty cheap on Ebay. Are there other ones that go relatively cheaply? I don't currently have a dual-band router, but am finding myself in need for an N card so I figured that Linksys isn't a whole lot and just go for it. I also plan on maybe getting a dual-band router in the future. On top of that, my current N adapter (AZiO AWD102N) won't go past 135mbps even when right next to the router. Also, the card actually performs better on G versus N when in the same spot. It could be the router (netgear wnr2000), but I figured the wifi card is cheaper to replace, and since my wifi card's a cheapy, it makes sense that the problem's with the wifi card (the card or router have never dropped connections, it's just the speed that's an issue.)