Looks like a pretty complete list to me. It depends on what you're looking to do with it. If you're looking for an around the house device, the Tungsten C or LifeDrive look pretty nice. The C's QWERTY keyboard and built-in WiFi are pretty compelling. If you want a smartphone, I lean towards the Treos. I looked at the Blackberries, but the lack of third-party software coupled with the expensive BB service ($30 a month for T-Mobile vs. $5 for t-zones or $20 for full web access) pushed me away from them. I have a Treo 600 and I'm extremely happy with it.
The Treo 650 can handle XHTML and CSS. You can also download ssh apps for it freely (as in beer). It's keyboard is also much improved over the 600 (and I like the 600's a lot).