I am leaving my Pre, I loved it too, but it has gotten more buggy and slow with every update, I'm even overclocking it and still lagging with simple stuff. It sucks to be speaking with a client and trying to show them an email or schedule something on the calendar and have your phone **** the bed.
I love WebOS and I have dropped some science on some iPhone users by demoing Pandora, Calendar, Email, Web, etc, you get the idea, all at once. But I have to agree, the hardware just isn't there yet. One of the simple things that I thought it should have but didn't was a compass, I mean, simple stuff.
Anyway, I'm very excited about the EVO, it's my first Android device and I know it will likely be trumped in a few months, but I feel that I have bought a device to be excited about for one year until my Sprint Premier account comes up for an upgrade to the EVO II.