"I would go with the WL-520gu, but only if you're ready to learn a little programming/Linux if you don't already know any. Most of the major Open Source router firmwares out there can support 3G/GPRS modems, it's just a matter of preference and…"
"$250, huh? Why not spend $30 on a DD-WRT compatible router that can support a WWAN (cell modem) over USB AND has TWO serial ports along with 4 switched Ethernet ports. Seems like you would save a lot more money and it would be running Open Source…"