I am using the iphone 6 which I feal is the great version of iphone till now if I talk about the new version 6s 7 and 7plus all are good but they dont worth to spend that much of money on these phones as in 6 itself we are getting ios 10 which is on all the iphone and if we talk about difference there is only different betweeen 6 and 7 is only of camera that too a minor difference and even with the processer aswell so I dont feal worthy to spend 60 thousand on such products as 6 is also fastest and I am currently using it and fealing worthy of getting this product
so choose your dicision visely guess
take care
cheers guys