It's a shame Tennant is the one who hasn't aged, because I suspect, since it's Rose, it will be her Meta-crisis Doctor, not the Timelord who Regenerated into 11. That would allow for no explanation necessary for the aging.
The aging wouldn't bother me at all though, personally.
McGann would also be great, he only had the one movie, and he's fantastic in his Audios, so it would be great to get to see him again. Still, would love to see at least one of the older guys. 1 and 2 played by the Biopic actors could be really cool, especially if the Biopic airs first to acclimate us to their version.