As been mentionned in the thread, I would highly suggest you getting a Sony Ericsson phone for a simple reason :
The developpement that Sony Ericsson puts to your disposition is much higher than other.
Exemples of the developpement put to your dispositions are the Themes Creators, the gaming programming and a lot of cracking available (as XS++ and FAR Manager), making it easily possible to take the biggest advantage possible from your phone.
Some sony ericsson phones I suggest :
W810i if you don't have a hard-drive mp3 player (it uses the pro-duo memory stick, which is a lot cheaper than the micro-sd that other phones use)
K790a is a nice phone as well, camera feature is extraordinairy as I hear (although I never tried it)
http://www.sonyericsson.com/spg.jsp?cc=ca&lc=en&ver=4000&template=pp1...
For more SE Phones.
Enjoy.