I was pretty impressed with the Toshiba e310. I am not sure what makes the e335 different. I have heard there were many problems (battery life, etc.) with the e740 that may have been worked out in the later revisions.

The Dell Axim is too new for just about any of us to comment on. From what I've seen, it looks too bulky for my tastes.

You may also want to consider the Viewsonic PC V35. I think it's going to come out at $299.