Help !!! Trying to come to conclusion

[Grods68]

ok .i had a nano have jjr h8 did the usual change the motor thing , fun to fly best at night , usually loose them in the day when there high and far can't judge but they come with great lights for night . Anyway I wAnt. GPS . I'm looking at the 3d x8 I like the speed of it but don't feel like ripping open a brand new quad to rearrange the motors to there correct area . I also like the idea I fly4 but some of the rtf say they have gps but in there fine print it says optional . Trying to get a straight answere from China about it is next to impossible . They don't respond unless you want your money back . I like at least a 350. Mm. Want something pretty fast with gps here the tricky part under 400$$$ any suggestion or answered . Thanx guys