I would also add, when it comes to 4K and, for example, MacBooks, things fall apart quickly in my opinion. Cables, adapters/dongles/docking stations just must match up for everything to work in proper 60fps, and it gets worse if you have two external displays.
As for my home set up, also stayed at 25" 1440p. Nice balance for work, hobby and occasional gaming without braking the bank for a top-tier GPU.