I only hv X6R and 808e ... 808e seems slightly bit higher grade (plastic) than x6R, but Mbx6r handle better and easier ... (Odd layout for 808e) but XB8e seems very diff to xb9 or 808... If only $300 more, I may suggest the Xray, as long as good parts support.
3.0 has better (more modern) layout, and lower CG .... Very good quality too, but Xray still has edge in material ... I like it as it is slimmer, better looking....
但講講吓仲有 Tekno, Snake...etc...