The legs are not a bad idea, however there are some decent starting legs from HVH so there may be some better spots to upgrade. Possibly a ring?
If i were you I would definitely get into looking at wyrmrest accord rep for the chestplate there.
With triumph badges coming out for heroics soon... I would definitely look into getting yourself set up with things you wont replace w/ those. The rings, necks etc are a great choice until you can get into raiding etc.
Take a look at this http://www.tankspot.com/forums/f97/4...gear-list.html
It will help you make the right choices.