Q. Should I go for Versys 650, 1000 or Tiger XRx ? I have big plans to travel around the globe on motorcycle?

I would Reccomended you the Vstrom650. Reason... global riding you need as light as possible , I ride a GS1200 And a TIGER800Xcx. / but on found a rented v-storm 650 I had in Thailand a God sent. Reason is you are going for long terrain hilly mountainous roads . Many time can get traffic clogged . The vs650 move at slow speed extremely well , much better in fact than the tiger and GS I feel. Also Much less clutch work. Seem to have a higher low end torque (maybe due to the vtwin) for slow hill climbing and engine braking than the Tiger. And the vtwin is really a gem of an engine . Top end speed is also no slouch . More than can legally handle. Ride comfort was superb with that amazing seat (better than the GS). Cheap easy to push around , parts pebbly easier to get also . Maybe you loose out at the top end speed and handling. But you are not going to do that in a globe trek tour. Hands down bro .