I couldn't find any reviews of the MSI GX60 GT60 laptop or for that matter any Core i7-4700MQ/GTX 770M CPU/GPU combo.
I did look at the Xotic PC web site and found this nice configuration: Core i7-4700MX/AMD 7970M XOTIC PC Sager NP8265-S (Clevo P150SM) The problem is it's above your budget...