Was given a suggestion to try pally/priest/mage. You experienced dual-boxers...will this be too complicated for a beginner? Your opinions would be greatly appreciated!

The priest/hunter/hunter is going well so far...already lvl 20. Warrior/priest is good too just not as fast but I dont die (warrior is fury). Really interested in the priest/lock/lock idea or even pally/mage/warlock (lock casting nukes).

I doubt later on I'll be playing all (3) in instances...unless they are two mages...two locks...two hunters...etc. I want to be able to do raids so..just food for thought on my goals.

Thanks!