Need Recommendation

Well, I have been using X700 and quite bored with it. So i need the recommendation for my next phone.

Price range - $180

Phones chosen (so far):

E250
Z510
E690
X670


The question is, which do you people recommend and why?

I'm in love with the u740, its very customizable, and you have to love the full keyboard.

Plus there all of the hacks are out now too!