Need To Know!

[cscoot03]

Ok I'm not with Sprint anymore even though I have my Treo Pro's still, I Need To Know where I :
1)Use my STP with another carrier,
2)Where can I activate an un-locked phone,

3) The most important of all WHAT New Phone is worth buying?

I'm looking at the HTC Magic, the Touch Pro 2 (but I think that's too heavy) & the Diamond 2 but I don't think that's coming our way.
So what do you think, what's a really good phone to get & where besides ATT, Sprint to go?
Thanks everybody ahead of time, Please help this is Very Imoprtant to me.