Rogue + BM Hunter + (druid or priest?)

Hello all,

Just looking for opinions on whether a priest or druid (and which spec) would likely be the best match for the group. I'll have to pay to move either the priest or druid over (faction and realm, ie 55 bucks) so wanted to get some expert thoughts on it before I do. I have not boxed the three together before so my experience is limited.

Thanks!

i like the idea of a druid(prob resto?) in the group just because they all have a sort of stealth, could come in handy