Here's my take on it...
I was on iValue1 for last 3 years...
I know i never utilise the quota given (the voice/sms thing), more or less may be up to 30min call a month(excluding family line), almost 0 sms (with IM around, will u?)
so i m paying 100++ for the 2GB technically...
i don chg phone when new gen release...but rather on my 2-3yr refresh...
so when put that against the Surfmore50 vs iValue1
by end of 2nd year i pay less for the TCO with SurfMore than iValue...
and since Maxis give a shit on pre-order...just jump for Apple Store...
got the device within 5 days, 2nd day walk to a maxis outlet and chg sim...kaotim...
n now my bill is on the 50++ 1...yet to see how much it will become...but for sure not 100++

Just cause you don't use the phone much. Doesn't mean the rest are like you
I easily finish up my 1000 minutes on my I value 2 plan. The data is always utilized to the max too. Tethering while out and about eats data