Upload & Sell: Off
If they stuff a D7100 ability into a pro body, I'll buy.
Whatever the case, I can manage with the 7100's for now, and have only just switched my studio rig up from a d5100 to a d5200.
It really becomes a question of value versus need.
If the need is for a pro style body, the D7100 does a half job IMO, but the interior parts are plenty for most with that same need. If the need is for features, then the D7100 does 99% of it.
However, If value is in question, and you plan to shoot pro with these things, a D400 would be a no brainer. Assuming it is with a longer lasting shutter, better (read: easier to set up and change settings) body format faster AF (?), more robust body casing/better weather sealing, faster X-sync. etc.