Coilover install question...
Coopers are going to be the most cost efficient. I'm running the toyo MT's on my truck now. I absolutely love them. In comparison though the trail grappler and the toyo MT are almost identical. The same guy owns both nitto and toyo. They are both 10 ply tires and have the same weights. Downfall is that the toyo's are usually more expensive than the nitto's. I think the toyo's perform better though and also ride really well. So in the end when comparing the toyo and the trail it ends up being more about preference and budget. I personally prefer the toyo's cause I think they have a little more road noise (which I love) and think they clean out a little better as well as look better.
At your new height setting I would go 34. Check the toyo metric sizes. They have some odd ones that are like 34x11.5 and whatever. Might find one like that you might like as well.

