just ordered my wife a Desire S, finally getting her off that Blackberry rubbish!
I got a desire s last week after having a hero for the last 2 years. Its brilliant. battery life is about 2 days of normal use. its really quick, screen is lovely and build quality is top drawer.
plus it has android 2.3. i think the desire hd only has 2.2
The X10 is pretty good and has been replaced by the Sony Ericsson Arc(android 2.3)... my x10 has been flawless so far although my wife hasn't been so lucky, she brought hers the day after me and has had to return it 3 times now :(
My sister has the x10 mini but I find the screen to be too small for a touch screen phone
My missus went for a Desire Z in the end, still pretty nippy, but she wanted the proper keyboard
i have a Galixy S and im happy with it..
if i want more from a phone i will go for the moto atrix only for the webtop option just setup citrix and install the app and off ya go access to windows a swell..