Personally, I'd go with radically different styles, if you need a change of pace.

I've got my PvE team to 70 across the board, but have never 5-boxed them together.
This teams goal is to do every heroic as a 5-box team.
Prot Pally, Shadow Priest, Fire/Arcane mage, Demo Warlock and Dream Druid.

I'm in the process of leveling a 5x Shaman group. One shaman is 70 and basically full T5.
This team will be 4x (new shammies) Arena and 5x (all of them) BG's.
The others are 65 in outland quest gear.

I'm also in the process of leveling a 5x Hunter group. One hunter is 70 and boosted like my Shaman in team 2.
This team will do dailies and farm. It will cover all the gathering skills.
They are around 50th level, haven't played them in a while but will get to 60 before expansion/RAF expires.

I'm tempted to try 5x Druids (Dreamstate/Boomkin) or 5x (Disc) Priests.
If there's enough time to RAF them up, after the other teams are 70 (shaman's) and 61+ (hunters) and before the expansion comes out...




Well basically, each of my three teams that are around now, is radically different from the others.
I have a PvP team, a PvE team and a farming team.
Playing any of these is a big change from the others.
If you're burnt out on one teams style, I'd recommend something really different. It doesn't mean you're done with your shamans forever, just that you want to try PvE heroics or whatever as a break and change-of-pace.