Treo 600 instead of Tungsten T3?

Thinking of a Treo 600 instead of Tungsten T3:

- The Tungsten T3 is nice but pricey, sort of a major upgrade from the NX60, but doesn't have a keyboard - and that is a major concern. After 2 years of using the NX60, with a short break for a couple of months while I used the works Tungsten E primarily (which ended when I had battery problems with Tungsten E along with losing some Blog and Journal entries between the 2 PDAs), my Graffiti writing skills have diminished and I got used to "ThumbBoard" type data entry on the NX60. To spend around $300 on the excellent T3 but then find inputting my blog entries using Graffiti slow and tedious would be a real downer
- The chance to try a smartphone (PDA/phone combo), something I've really wanted to do. The Treo 650 with its 16-bit (65K colors) 320x320screen & faster processor, as well as (presumably) updated PIM Apps is tempting, but at $449 its a bit steep (and well over $300), and I'd be tied to Cingular for 2 years - whereas if I don't like the Treo 600 I can just sell it Although the Treo 600 has a smaller and lower resolution (160x160) screen than I'm used to, the extra $150 plus a 2-year contract for a (320x320) hi-res screen (and faster processor) doesn't seem worth it. The idea is to see if the smartphone (PDA/phone combo) is as useful as reported, for a reasonable price.