The Nokia 5800 has a lot of fans and a decent following. It's not my cup of tea personally, but it's done enough to win fans so must be doing something right
The LG Arena is pretty good too, considering the price it's available for. It's not in the same league as the iPhones of this world, but it's a good little phone that's for sure
The Blackberry... well... no thanks. It defeats the point of what Blackberrys are all about by losing a physical keyboard and implementing that odd hybrid touch screen, where you select something with a gentle touch and confirm something with a press of the entire screen. Odd. Blackberry are awesome at making messaging devices... they should stick to what they know best.