I have run the following on my 4runner in the last 6 months
in order from start to current
-Bought the truck with Michelin LTX A/T2 265/70/16
drove nice and smooth, quite and handle great
-BFG Rugged Terrain TA 275/70/18
nice quite tire, tread not too agressive tread, didnt do any offroading
-BFG All Terrain TA KOs 285/65/18
real nice tire, incredibly smooth tire for the more agressive tread. did not notice it being any louder than before with the rugged terrain
-Nitto Mud Grappler 33x12.50x18
OMG WTF loud! like airplane was about to take off. i had to crank the stereo up all the time to get over the noise. this lasted all of 30 miles
Now i am back on the BFG AT Ko's. I really like them, i bought these 285/65/18 used on craigslist for $240 for all 4 tires, bought the rugged terrain for $100 for all four and just sold them for $140 LoL. Also just bought and sold the mud terrains too.
I do however have experience with the cooper discovery ATR's on my volvo.
I had a ball with them in the snow. they were great even with this car's mediocre AWD system.
I was one of the few cars out when we had a huge storm a few years ago!
this is me out driving to pick up my friend. look how high the snow is. i took a picture of him from my car, then he took a picture of my car from where he was.
i suggest, scouring craigslist for a used set. lots of people are able to score a decent set for cheap. [MENTION=59048]S p a r k y[/MENTION] scored a set of cheap used tires from a guy that had a jeep!
A big factor in what tire to choose is what size you going to do. Some tires in 16's dont do as well in 18's or vice versa. so try and compare apple to apples.
good luck, you have lots of choices and you are going to get LOTS of different opinions.