Does anyone know the differemces in all the EVDO cards now available from Verizon? I currently have the Audiovox 5220. But, now thats discontinued after a short run. Are their issues with it? Is the 5740 better? How about the Novatel V620 which I now see in stores? And there is also a Kyocera KPC650 card. They all do both 1XRT and EVDO. So what are the differences. Do they all have external antenna connects? I know my 5220 does and their are aftermarket kits for it to increase strength.

Thanks All.
--Eric