Ditto... If the size and weight of the G70 are not a dealbreaker (and you have an FantomX8!), the SMF editing tools on the G70 are light years ahead of any competition.

Sonically, the T4 will be the more advanced arranger, especially lead sounds and guitars, but if you are wedded to the ballsy sound of the Roland's, and want advanced but easy to use header editing as well as a comprehensive on board sequence, look around for a good used G70 or E80 (if you can live with 61)...