Maxis VPI 50 is enough but mind that, the data is not sufficient for you.., you need to add..,
ok.. let see the Maxis Value First 30 [it is new one now]



75 mins of calls[to different network = RM 0.20 X 75 = RM 15
100 SMS = RM 0.10 X 100 = RM 10

so total is  = RM 30 + RM 10 = RM 40 ,

the talktime rebate is up to RM 30 , so.. it is waste if you don't use it.. 

Plus , internet package = 500MB for RM 38/month..

so RM 40 + RM 38 = RM 78/month
Celcom Exec 20 , Access Fee is RM 20 + RM 15 + RM 10 = RM 45

plus mobile internet , Celcom broadband mLite [300MB] = RM 28

overall  , RM 45 + RM 28 = RM 73
so.. Maxis VPI 50 is still better package .. since you have more SMS 

but need to be careful about the data.. you can always add RM 18 for 100MB data
based on your usage 
prepaid or postpaid..?

if Umobile okay for you .. just go for it..

prepaid = Top up RM 10 for a month , enough for you    you get free calls and SMS too