netgear-rnd4000-readynas-nv-v2-4-bay

Also, you don't need a USB card in your PC to connect to your PC. If your PC is a desktop, most likely it already has a 1 gigbit ethernet connection which you have used to connect to the router. However, the ethernet ports on the router are only "fast ethernet" not gigabit ethernet, so it will be a bottleneck, regardless of which NAS you use. I was faced with the same situation as my WNR2000 router had the same problem and it even slowed down my old NV+ (v1). A friend gave me a piece of advice which solved my problem - I inserted a switch between my PC and the router and connected my NAS to the switch. Then all the traffic between between the PC and the NAS avoided going through the router and getting slowed down. I would recommend either the Netgear GS105 or the better dressed GS605. That same eBuyer site has the GS605 for 20 pounds and the GS105 for 25 pounds.

I would stick with Netgear, I tried a 3rd party switch and it worked fine with my old slow NV+ (v1) but did not work properly with my newer faster NVX. Now that the x-86 and ARM based 64bit NAS units are out, I would be even more inclined to stick with Netgear.