G2 - For a 5.2" , its a great device . Since u r in Sg , get it from http://www.sgkeitai.com/ for the korean version . Expandable memory slot + removable battery . And please request for S version , not K or L . Even all are LTE-A enable , I get better LTE speed on S compared to L , dunno why . Maybe by default L version band is not compatible in msia .
S4 - Skip it since u wan the latest right ?
Z1 - Overall , its a good device except for the screen . It's a turn off . Considering it's the latest , newer then XZU , the screen is a disappointment . More like Sony recycled their old 5" screen on their latest flagship
1M - Oversized HTC One and once again , it's an old spec
N3 - Unlike N1 to N2 , I dont feel a big difference between N2 to N3 . Also , u already have er...4 N2 , y bother with another device with a Spen unless u wan the latest hardware + screen and selling off all your N2 but then again , 2k resolution device aka Vivo Xplay 3S is coming soon like next month

Personally , I'll go for G2 but then again , it's your choice .
1U , Cubic Shop . Mycase is selling their SGP there .

If u buy SGP Tempered Glass , it comes with 3 different colors of home button sticker and if it doesnt fit , well , try again ...
Pm M1Store in LYN , he got ready stock but dunno sold out or not
Sure or not so cheap ? Vega LTE-A also not so cheap lor if Korea itself . Apa lagi Secret Note . USD1k i believe ler , that's the usual selling price currently outside although not so expensive

S planner works great ma.. 
sync well with outlook also

Yes, you answered it yourself. Just tick the box do not show. Samsung Kies also want your data, besides google.

You can try a calendar. Is like s planner too.for those using custom launcher if want the calendar widget then use a calendar