I am guessing you want boggers because they look good. I can't blame you and probably the main reason why I bought mine, they are a crazy looking tire. Don't worry, I won't give you any crap for wanting to look good. /forums/images/graemlins/thumb.gif
They are quiet and smooth when they are new with very low mileage. When I went 3/4 ton and put my new welds and boggers on I thought they rode better than my previous SSR's. That was short lived.......
Boggers wear different than any other D.O.T tire. The smaller lug wears faster than the larger one giving it a ride like a rice and cane directional tire (extremely aggressive tractor tire) What they do is as the small lug wears down past the large lug it won't touch the ground at slow speeds thus delivering a terrible thud...thud...thud at slower speeds. Don't get caught in 10mph traffic for long or you will have a headache. Otherwise at higher speeds they are smooth as glass. Smoother than a TSL and SX from my experience. They do wear very fast, I have about 7-8K on mine and have about %60 tread left. They get extremely loud as that little lug gets smaller but I personally liked the sound sometimes, othertimes it got old when I was tired.
Oh, and if you have anything onboard that could possibly make a squeek or any other sound....the boggers will find it.
Go for it if that is really what you want no matter what the consequinces but otherwise I would go with a TSLR or SSR. I DD'd my K5 with BFG's, SSR's, and my current boggers. The SSR's rode the best, the BFG's handled the best and were the quietest, and the boggers by far give my K5 an aggressive look that can't be matched by any other tire but they are also the worst on road I have had.
My blazer is currently not street legal due to smog issues and is no biggie since I bought a 2001 D/CTD but I do plan getting the K5 back on the road in the future and yes, the boggers will stay because I will only cruise with it after I finish my restification. Having a badass show worthy truck on boggers looks cool and is fine for a cruiser but not a daily driver IMHO.