I did end up going with the 5x boomkin team. Currently I'm leveling up 2x boomkin, pally tank, and shaman healer. When they reach 80 I will transfer the two new boomkins to different accouts so I can have 5x owl goodness. I haven't decided how I'm going to gear up the two boomkins who are on the shaman and pally accounts, but I'll likely just dual spec one druid to a tank and another to a healer and then just roll with an all druid PvE team. I haven't regretted the decision yet and am actually trying to stay away from shamans as much as possible... I definitely think shamans are the strongest PvE class, but I have a feeling that some totem nerfing is going to come (non stackable effects) and I like my treants too much to give up.