Eh if you insist on a physical keyboard, you could do much better. HTC Evo 3D I think is just a pure touchscreen slate phone right? A friend of mine has the HTC Evo Shift 4G since he insists on a physical keyboard (former Blackberry user). If you want a physical keyboard phone, a slider slate smartphone like that would be a better option so that you have a decent-sized touch screen to play with (it's 3.6". The iPhone comes in at 3.5" and that's a decent size. So anything 3.5" or so is pretty much good. My secondary cell (Motorola Spice. It's like a slightly smaller cheap man's Blackberry Torch that runs on Android 2.1. For it's price, it's actually not bad but you get what you pay for. lol.) that I just got recently has a 3" touchscreen with a physical vertical qwerty keyboard. That screen is way too small and I actually prefer the virtual keyboard on my 4.3" HTC Desire HD to the physical qwerty on my second phone). The screen on the ChaCha is way too small. I don't like the Blackberry design. Definitely go with the HTC Evo 3D if you don't need a physical qwerty. If you need one, HTC Evo Shift 4G may be a good choice. Though it's almost a year old. Maybe there are better Android smartphones with qwertys on the market right now.
