I have the HTC Touch Dual, and I love it. Tons of RAM, installing apps to the memory card, 3G. I have a friend that has the Touch and he went back after a month to his pearl, because he couldn't type as fast on a touch screen as he could on a normal keyboard (hence me getting the dual).
honestly... I don't know if I'd go back to my Curve. I miss it, it's gorgeous keyboard and it's masculine size, but ... I don't know. WM6 with Touchflo is awesome