Vacation vs email

After a 2 week vacation (a "near offline experience") I managed to reduce my business email inbox from 450 unread items to 17... Those 17 I really have to act upon.
(And I'm not talking to email I receive from a maillist, or other inboxes like Flickr, Friendfeed, Google Reader, ...)

Which means that in 2 weeks time I have <4% meaningful emails ?
Ok, I've read about 80% of the emails - at least the subject and the first couple of lines - on my Palm through my bluetooth/6233/gprs connection. But that was trouble enough.
a) VersaMail on the Palm T|X does not successfully delete emails on the (IMAP)Server, not matter how often you tell it to...
b) Neither das the Nokia 6233 built-in email client; though it says it does IMAP and it from a pure protocol level does it of course, it simply only offers POP functionality, though; i.e. retrieve, mark-read on the server (always on retrieval, how annoying) , but no delete.
c) more and more emails tend to be HTML, so neither the Palm nor the Nokia is a good interface to read them - unless you can get actual information out of a "Your email-reader does not support HTML...."

Time to get an iPhone or Blackberry ???
Or are the above stats (<4%!) telling me, I should not even bother with mobile email anymore (after I successfully have worked with it (and implemented it earlier myself) since 1999...
My god, that was last century ...