I have used all these three
and you know best i found and still on my diamond is SENSE 2.5
. You know why it is perfact in all aspects
..you have no need to install any fancy software
for contact or any shell as it has its own well designed tabs/contacts/options/home screen etc.... Stay with HTC Sense 2.5=D>... SPB mobile shell gives your diamond a feel of china cell phone
.. all china copied cell phone have an user interface like SPB mobile shell.
.