most of my friends have iphones and androids ... but mostly iphones, and all of them rely on IM messaging apps like Viper and What'sapp on their communications, unfortunately the N900 hasn't been supported and I was left out because of it (I think this is the price I pay of being a geek), now I am looking for a qwerty android phone to combo with my n900, I simply can't abandon my n900.

I want some help picking up the right phone.

*budget 375$ (cheaper phones are welcomed)
*screen size same or slightly larger than n900 (3.5~3.7 inch)
*no less than 8GB of internal memory
*not looking for a fancy blazing fast dual-core processor, just a decent performance well do.
*rear camera res no less than 5mp
*unlock-able to use with carries outside the US/EU

any suggestions ?
also is this the right section to post?