canon sd870 or sd 1100 or sony w170 or sony 150??? suggest

[sweethero_2006]

i am confused in between two model canon 870 and sony 170...anyone suggest which is better..also take other model like sony w150 and canon sd1100 into consideration....
in each site there will be written canon is in top than other..but i personally feel also compare between canon 800 and sony w 55 ..both 7 mp but sony takes much more good photo than canon but it is ranked as b-..why i do nt know...so i do nt hv faith in this site.....so anyone who personally use or hv an idea plz suggest..i am waiting ur suggestion....thanks to all of u in advance!!!!