hi all O2 user i would like to join u all as O2 user 2 now i am still thinking which O2 is for me

so should i buy

02 IIS / 02 I / 02 Mini / 02 Xphone II

i cant find a site that talk about o2 phone that i really can take review of..

like does o2 go with 3g..( i know it is not) i like o2 is b-cos wifi... or out there any phone that with wifi + 3g + radio?