2xperia

M planning to buy 2 mob's,1 for my sis(<15k), for me (>15k) I have 4 inmy mind,bt lil confusion,plz suggest me wch would b d best wid reasons also plz.. 1)Xperia J or Lumia 620 2)Xperia L or Lumia 720 i had posted a similar query prior,sry,.... plz give ur replies,i gotto buy within 2,3...