should I get the Treo 700w?

I am currently using the tre0 650 - should I get the 700w? Is the windows OS better, or I'd keep with the 650?

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I don't think it is worth the change

I've used Treo 650 and I use the XV6700 - I prefer the Windows Mobile OS so I'd suggest you getting either the 6700 or the 700w

how fast is the 6700 compared to the treo 700 and treo 650?

I think the Treo is faster