Palm Treo 700w / 700wx

I have a question re Outlook Exchange. I can get by for the most part with ActiveSync pushing new email through EVDO, however at times I need to access all the Outlook folders on my office computer. For that I am assuming I'd want to connect to the Exchange Server (like I would in a hotel business center for example). Can I access this on a 700w through regular web access via EVDO, and would this be fast enough to navigate through folders etc? Or would I need the web access speeds of wifi (via a Palm wifi card)? Can I even access Outlook's Exchange Server on the 700w via either EVDO or Wifi?