I've got 8 80's.

5 shaman (4 horde 1 alliance)
Druid (horde)
Paladin (horde)
DK (alliance)

With

75 hunter (H), 74 Priest (A), 71 Warlock(H), 71 Warrior(H), 70 Hunter (H) 69 Pally (H)

Got 2 rogues, a Druid and 2 mages in the low 60's too.

I'll probably level my warlock next, bringing the priest across as a pocket healer perhaps. I will BG regardless, but am hoping the XP is buffed back up soon.

I'm thinking 10 80's will be enough, but who knows - 1 of each class would be nice.