I'd go with the vendor who will speak with me on the need and supply a solution. The reason why is simple. If the solution doesn't work, then you can ask them for a full refund because the solution failed.
You might be expending 500 dollars for such and this is only fair.
I'm looking for a PDA to use when I'm on the road and need to dial into POP email. Need some advice on what to go with and if this is the best device to do this. Looking at Ipaq H2210 and Dell Axim X5. Thanks for all and any help!