I will be doing the LIM gaskets on a 2008 L26 engine that has 143K on it currently. While I am in that far would it be worth while to change all the lifters? I can get a new set of Morel 7717's for around $210. I would get GM LS7 lifters but those have more than doubled in price and I can't justify $463 just for lifters.

There is nothing currently wrong with the stock lifters that I am aware of, this is more just a question of "do I really need to change these while it's open?" type-thing.