having had both the 6700 and 6800, the price is right on the 6900. that being said, if you can't wait for touch pro or diamond, the 800w is tempting.
if you want WIFI - touch pro or treo 800w
if you want IRDA - looks like the 800w might be alone in the 2008 family
I've decided I'm now in the market for a treo 800w... (edit heard they aren't very durable. maybe not)
Edit: just noticed that's your first post. welcome! 