> Performance of the computer is quite important for me. I'm an Android developer, compilation of a big project I'm working on takes enormous amount of RAM and CPU nowadays (with new Android Studio it's even worse).

Buy a powerful desktop PC and you’ll have a few bucks left over. Seriously, I don’t understand why developers continue to shortchange themselves by using laptops for heavy workloads. If you have to work away from your office, Remote Desktop to your desktop machine from your old laptop.