Hi guys, I stumbled upon the world of eGPU's today when deciding what MBP to buy. I don't have the money right now for the MBP with the GT750M installed so I plan on buying the model with Intel Iris Pro graphics only. If I get this I'll probably buy an eGPU around Christmas time. I've seen a few threads about MBP's and eGPU's but I would just like some clarification. With this model of MBP, would an eGPU work fine over Thunderbolt and do I need an external monitor? I've seen a few people say you can pump it back into the display but I've seen others saying it will only work on an external monitor. Can somebody clarify this for me please? also would the 2.2GHz CPU be sufficient for games like Call of Duty, Grand Theft Auto and Watchdogs?