245/70/16 will fit fine with no rubbing, many many people here have done it. But keep in mind this is the internet, so every time somebody says something will work, somebody will say it wont. Its like we are all trying to write a thesis here,

Anyways, many have done it, and as long as your tire isn't super agressive like the KM2s than it will fit. If you wait a few weeks I will give you a full review of the KM2s in 235/70/16 lol. I've heard there amazing though. As for the rest of what you listed, I've heard the destination are a good tire, but for me, there not agressive enough, look like a highway only tire, nothing for deep mud. The Grabbers are a cheap TAKO, I've heard there pretty good though. I've read some comments about hydroplaining but if you don't slow down in the rain, anything will hydroplain... well, maybe not treads lol.... The takos are the ultimate all terrain it seems, ive seen a lot of tjs tear through some crazy terrain with them, and in remote nova scotia, its all I see on the roads after a snow storm... literally :S I've been warned that with the km2s you have to rotate them a lot, like every 5k, if not they will wear very uneven and very fast, but if you do roate them a lot, they last great. Here is what I would say
If you are strapped for cash but want a tire that will be fun off road, get the grabber
If you want a tire that is great on the street with just enough attitude for some trails, get the destination
If you want a great all terrain tire, get the tako
If you want a awsome mud ture that is happy on the highway, get the km2. Keep in mind 4 KM2s in 235/70/16 just cost me $1008 here in Halifax, thats with my dads military discount....