I have done most of that on my Pocket PC, less a biggie, HTML editing. I've looked at pages, but never changed code or uploaded them from a PDA. Both Palm and Pocket PC will sync well with most calendars, especially Outlook. Last I looked the Palm had the real edge for Act users.
You might also look at sites like
Brighthand and
Pocket PC Mag. The former has an extensive forum like BOL where users exchange thoughts. I found that helpful in the past to make sure I knew about service, hardware and software issues. As an example of things you can learn, I originally got my Blackberry from AT&T who I use for the family cellphones. The web browser they have only accepts WAP sites. That was of absolutely no use to me. T-Mobile reads HTML sites though. I could have saved a lot of aggravation. You may also read of constant screen problems and such. That was big when I bought my last PDA and it steered me clear of problems.