Which handheld is the best for me?

Hello

I have been investigating which kind of handheld would be right for me, but as of yet I have had no luck. Any suggestions would be appreciated, but I do have some idea as to how it should be. I have put the must-have features in bold.

It should have at least a 3.5 inch screen
If not touch screen, then must have a qwerty
Must play mp3s, video (mp4, AVI or DIVX/XVID preferred) and images, like jpg
Must have a web browser that plays videos on youtube etc. and ability for downloads

This is really important - it MUST be able to have support for applications, like BitComet for example. This has been the main problem finding this.

Also, if it has less than 8GB of storage space, there must be support for extra space, like SD, SDHC, micro SD, USB or Sony M2.

Thank you

HTC ADVANTAGE X7500 :
http://www.gsmarena.com/htc_advantage_x7500-1887.php

5" LCD + 8GB RAM + PLAYS EVERY FORMAT (SOME OF THEM LIKE AVI NEED APPS WHICH ARE FREE TO DOWNLOAD, SO DONT WORRY ) + MINI SD+....