I have a Sony Ericcson T310 which I like a lot.
(Looks much better IRL than on pictures, a lot more metallic looking and less plasticy.) But it's already an older model. Only con I can think of is that the color display has just 256 colors. But it's a good display otherwise.
I like the calender function, alarm clock, feature to copy the entire phonebook on the sim and from the sim on the phone. (Nice if you get a new simcard or someone else needs to copy theirs.) Infrared port is very handy too as I have a laptop.
Just recieved the Siemens MC60 a couple of days ago.
(Free from the bank. A nationwide "if you safe a certain amount of money you get a phone for "free"" offer.)
I believe it's also an older model. I'm not overly impressed with it. It doesn't feel very solid. Has about the same features as the T310 but the display is 4096 colors. Yet it's worse in many aspects than the T310's display. It distorts pictures. Which is not very handy with the build in camera. (Everyone gets long faces). The camera is crap anyway. Really bad!
The phone has no infrared port or bluetooth so you need a cabel to hook it up to your computer. I'm not planning on getting one so the camera is completely useless to me.
And I haven't found a way to use non-polyphonic ringtones with it.
If I had to choose between the two I'd go with the T310.