Also remember guys, that Roddio can be installed to meet your desired CPM, so your SR, C, could have been stiffer. Chris probably installed it at standard J-spec SR which may have been a little soft for you. For example my R flex W-5Ba just inserted into my epon without any adjustments CPM's out at 223 which is very soft with just a little adjustment as per Roddio Certified specs and it reaches 238CPM.
Both the epon and X-drive are wonderful drivers. Can't go wrong with either Jack, but don't give up on the Epon so quickly especially if you like the feel!