What kind of port do you use, PCIE, PCI? Half height, regular height?
I have this currently:
Rosewill RNX-N250PCe (RNWD-11005) PCI Express 300/300Mbps Transfer/Receive Rate 2T2R Wireless Adapter
It's a PCIE based wireless card, it's currently running excellent, and i've had 0 issues with it so far.
I've read some of the reviews on it at newegg and they are laughable about this wireless card. They probably don't have their wireless router set up properly.