Looking for recommendations on USB2.0 PCI cards

I currently have a USB2.0 PCI card based on an NEC chipset. It can only
do 16MB/s. Does anyone know of a PCI USB2.0 that has been used with the
USRP at 32MB/s? I choose the NEC based on it’s Linux support but I did
not know that the NEC chips have the worst performance on the PCI cards.
-Jim