I'm in love with this big guy :)

And here are the upgraded components:

• 1080P IPS Screen
• 512GB SSD
• DVD caddy replaced by a HDD caddy (intalled an additional 512GB SSD)
• Processor upgraded to an i7-4712MQ
• Grizzly Kryonaut thermal paste upgrade
• US keyboard replaced by another one with Spanish layout (original, found on eBay)
• RAM upgraded to 12GB (enough for me)
• Brand-new original 9-cell battery (also found on eBay)

I don't think I forget anything... well maybe the best upgrade: I use Arch, btw!