I bought Nokia 6300 a few weeks back. Its the new "choco" colour, it looks really nice.
The reason why I chose Nokia, was the ease of use of this handset. Slim built and "excellent screen resolution".
I can install themes with ease, and it works flawlessly. Initially, when I was installing themes on the handset, I noticed, it gave me an error saying, "Not enough Memory". I was wondering what that could be, since I had replaced the default memory card which comes with the handset, which was 512mb, I put my own, 1Gb card in it, and to my surprise, the card only had 170mb worth of data.
I then cleared some of the phone memory, which contains tones, and wallpapers, Once that was done, the other, so called, "heavy" themes, started to work perfectly.
What I didn’t like about the phone was its sound quality of the external speaker, need to be on top volume to hear it. and also the ear phones could have been better, maybe noise reducing types could have worked better. The presets in the equilizer are not all that effective, though they serve its purpose, however, could have been better!
Lastly, a decent phone with decent battery back up. I charge it almost after 2 days, with decent talk time and listening to music a bit.