Pally with druids, or shamen?

I have decided to start a 3man PVE group! I was looking for some advice on group composition because I have rerolled twice and cannot make up my mind!!!
Paladin tank is a no brainer for me since my warrior tanking skills are atrocious, but here is where there is some debate...
Do I use two druids or shamen for support. currently I am using two druids but was wondering which group would be better equip to handle instances?
I liked the druids for the HoTs and innervate but totem envy is starting to get me.
Another thing is I have never played a shaman before so I'm not exactly sure what I'm missing out on.
Any opinions/experiences are greatly appreciated.!

Thanks!

Biggest difference is that shaman have much simpler dps rotations (you can literally spam lightning bolt and do very good dps) AND can heal without shapeshifting. If you are used to shifting and healing on the fly with druids, then it may be a moot issue.

Bes advice is as always, try it out yourself, and see how you like it. if you are on RAF you will level up laughably fast

Thanks! that is exactly what i suspected.