Recently 19 twinking has become a hard race for new and improved gear. The bind on account shoulders from wintergrasp have made some thinks extremely OP. Not only that, but there is a way to get a +30 stamina and +15 resilience enchant to the shoulders. Also, there is a way to get +55 stamina and +22 agility to a 19's pants. I don't know how to get it, but normally attaching one of those pants enchants makes the item you use it on become soulbound.
Thus, after all of these new included items, your 19 twink can be at 2.3k hp unbuffed. The most HP I've seen on a 19 twink yet was in the Stormstrike Battle Group. It was a Druid who had 4k hp buffed. He had the fish feast "well fed" buff (which gives +30 stamina and some 46 attack power), but in general 19 twinking has been taken to a new level.
You can check out my twink Vitalia (realm is dalaran) on the armory.