at 68, regemming isn't really the best idea.
if it is better than your DW weapons, especially if you are semi-low in hit gear. You can just spec 17/42 and 2h dps, as slam is much more efficient than anything else for the last 2 levels. That way, you will keep your AP the way it is and even though your BT will be doing less damage than MS's, imp slam will def. make that different.
Alternatively, you can go axe spec and spec imp slam for even more efficiency [as you will have MS], but that's really up to you. You can dish out some good dps in raids as 2h fury since raid buffed, usually, you will be doing more damage with BT than with MS with the weapons that are available to you when you start raiding. Also, until you start gearing up for dw'ing [mainly the hit gear over the crit gear of 2h builds] it will out dps dw builds most of the time until the late stages of kara.