hmm.. if only among these 3 phones, yes, temporary even RRP for ZL is the cheapest now.. rm1599. market u can easily found rm1400-1499, got some seller sell in rm1368,1378.. which i think is a very best deal for this phone compare with other..

ZL is almost identical to Z, same hardware. Diff display panel, brighter display.. No water/dust resistant but got IR blaster to be a remote control.

ZR is almost identical to Z too with same hardware, but 720p screen resolution (better battery life), smaller internal memory with 8gb (5.2gb user accesible) - where Z/ZL got 16gb (11gb+ user accesible). Water/dust resistant. VGA front camera only..

For casual, i assumed as daily use only.. ZL is the best deal if u dont mind about resistance.. 2gb ram with 1.8gb user access, im heavy on social messaging and surfing people only, sometimes gaming.. i had no problem on this phone.. after installed and turned on all apps like viber, wechat,whatsapp, line, messenger, fb, dictionary apps and etc, totally consume me 1gb ram which left 700~800MB free ram.. even hard gaming like asphalt 8, dead trigger, real racing also no problem..

no lag noticeable in ZL, (should be same as in ZR, Z). only stock launcher may lag sometimes. installed new beta xperia launcher can solved this.