I have my X2 for a while now. i use it with the handsfree stuff from reinhard from handsfree-transporter.com. I love all of it.
I use the golf wheels, the are wide and big. In fact, the whole footprint of the x2 is wide, wich isnt a problem at all outdoor. For some studio or other indoor shots, its to wide, so an i2 would be better. Of course you can change the fenders and wheels of the x2, but sounds as to much work.
We now ( in co operation with segway netherlands ) came up with a other solution. I change my wheels from thick to thin within 4 minuts, and i leave the fenders with hardmount on. ( we modified that too. In total with the small wheels, the x2 is just 4 cm wider than an i2.
I love this, we slimmed almost 25 cm, great to ride inside.