I purchased an Acer last year with a similar set of requirements in mind, but found it a pain to lug around all day long, with the extra battery etc.etc. Last November, I bought a Dell PDA to cope with SatNav and a few of the laptop chores. Thing, is, that it is so damned useful (Wireless/Bluetooth) that the lappy now sits permanently plumbed in and acts as little more than a backup facility to the desktop. The PDA has been a revelation and I wish I had got that first.
Conan