To further what Cal said, BG gear works very well in PVE. The only stat that won't be used is "toughness" which as far as I know only works in BG or other PvP situations (servers, duels). The rest of the stats will work as intended.
I was wearing a few pieces (robe, shoulder) for quite awhile until I got some T9 pieces from various zones.
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Things I sometimes play...
"What do you want to be when you grow up?"
"I want to be a unicorn!"
"Awww, why's that?"........
"So I can stab people with my face."