Got the I2 and very happy but....
1) A little extra size wouldn't hurt for legibility and;
2) The I2 feels a little, well, small after having a 6X
The above two issues aren't deal breakers but nice to have.
Given that, after selling my I2 for circa £100, I would have to shell out at least £200, I would be keen to hear from anyone who has upgraded.
Cheers