I just got a 17 R1 with a 4700MQ and a 770m for a steal price, thinking of upgrading and keeping it alongside my M15x however I am unfamiliar with this new platform. Would a 4940xm from taobao be a suitable upgrade? They are quite expensive on ebay in Australia however I have heard that chips from taobao are of very low quality. Overall would you recommend that I keep this as a 17" laptop? It seems to be the last one that is truly upgradeable; or should I sell it for a 17 R5 or an older M17x revision?