I have the 315 Falken Wildpeak M/T's on my cruiser and love them...noisy, but all chunky MT's are. I was fortunate to grab them off of Marketplace for a steal when almost still new. I just put the new Wildpeak A/T4's on my 4 runner (2" lift and upsized a bit) and am VERY happy with them over the KO3's that were on there. Got them on just before the ice storms here in the Mid-Atlantic and the've been great. My only first concern was they were firm, but it's 20 degrees daytime, so cold! I double checked the pressure after a week or so, and the installer put them all at 40 psi and I could see the shoulders weren't even hitting the ground for the most part (salt is a great marker!)....bumped them down to the vehicle rating of 32 and they are perfectly flat across the tread contact now and much smoother ride with a perfect balance on all 4.
As far as where to buy, limited options, so just do your best shopping and factor in shipping costs as that can make or break a "good" price.