Samsung do Windows Smartphones with both a 3gb and a 4gb HDD inside.
My new phone thats on its way to me will be my 3rd windows based mobile.
Ive tried a symbian phone and it really annoyed me, (it was an N-Gage though) Windows phones just seem to do everything I want a phone to do, as well as make calls, it syncronises with outlook seamlessly. My contacts, calender and tasks are instantly copied across. I can play all my emulators on there, watch DIVX, and make the odd phonecall as well as browse "Het Internet"