i need advice,

i'm a phone noob, i pretty know nothing about them.
i'm buying my 1st smartphone to replace my lost handphone.

i'm aiming at samsung galaxy ace at price RM750.00(maybe neogociable)
but i fear as ace is almost 1 year old, and may soon to be obsolete,
from some web review(dated december), it does seem still able to keep pace,

or should i go with samsung galaxy W
its slightly larger, newer, better(?) and more expensive cousin
i didn't ask for the price, i'm guessing it would be selling at 930~950(but this is just guessing)
and spend less money in future month.

i don't change my phone as often, and planing to use this for really some time.

tl;dr:
samsung galaxy ace or samsung galaxy W

nexus s price is a bit out of my reach.

oh, maybe i search the web for the wrong nexus s
is it this Samsung Google Nexus S
http://mobilemegamall.com/gadget/238/Samsu...ecs-Review.html

or these?
http://www.phonearena.com/phones/Google-Nexus-S-4G_id5326
http://www.phonearena.com/phones/Google-Nexus-S_id4990

me phone noob