Help choosing/finding a good data stick

[PhotoJim]

Hi all,

I currently have a Novatel Ovation MC950D data stick with Rogers in Canada (that I've SIM-unlocked). I have a separate data subscription on a separate SIM from my voice SIM. In 3G coverage it works great but I'm having significant issues with it in 2G coverage. Unfortunately, at my cottage all I have is GPRS and EDGE, and no 3G. At home I have HSUPA and can get over 5 megabits per second, which is very good!

The issues involve significant packet loss and unreliability. For example, web pages never finish loading unless they are very simple. The problem makes the data card essentially unusable. I'm not sure if the issue is 1900 MHz service (3G is at 850 MHz here) or if the data stick is just not that good at doing 2G. It may even be a driver issue.

I know the network is not a problem because iPhone tethering works fine. Right now I'm doing Bluetooth tethering using a RAZR V3 on GPRS... slow but perfectly reliable. The cell site is very close; I have very strong signal strength.

So... I'm assuming that I should just get another data device since GPRS is annoyingly slow and I don't want to use my iPhone to tether (voice calls interrupt the connection).

I'd ideally like a device that supports quad-band 2.5G GPRS/EDGE (850/900/1800/1900) and tri-band HSDPA/HSUPA (850/1900/2100) but since my existing data stick already supports all of those bands, a non-3G device that supported EDGE would do the trick if it worked well.

I need this to be a USB device because I use the stick on several different computers, one of which is an Acer Aspire One netbook that only has USB ports, no PC Card or Expresscard slots.

Any advice? I'm okay with buying a used device if it's relatively easy to find and can be had in unlocked state. I also want the device to work with Linux if at all possible.

Thanks,
Jim