Pimp my Pally

[Talos]

if possible buy the mats for the breastplate and ask a friendly BS to make it for 50 or 100g.
on my server they try to sell it made on the AH for 6k, i got it made for 3.4k by buying the mats myself
jam in some +30 stam gems (or in my case a +10def/+15 stam, +30 stam, +10agi/+15 stam to unlock the socket bonus)

the stamina you gain buy this item will greatly help with progressing trough the heroics on your team
also the titansteel shield is not a bad choice, there are no shields in heroics to beat that except for the one that drops in heroic CoS

edit:
other cheap upgrades if you got the money for it
the tempered titansteel helm and boots add in a nice +def and +stam to your gear, depending on the price on your server, once again buy the mats yourself if that turns up cheaper

edit2:
check my pally's armory (click on wow characters under my forum name) to see how i geared him, have only been gearing him for 3 weeks now and already at 38.5k HP