I can highly recommend the new Opera mobile phone browsers.
I have recently downloaded Opera mobile 10 beta 3 for my windows mobile phone and it blew my mind with its speed.

To download Opera Mobile directly to your phone simply [url=m.opera.com/mobile]click here[/url] using your phone’s default Web browser.

To download it to your pc first go here!

I can only vouch for the WM 6.x version since that is the only OS I have on my phones

<3 Grape