Don't want to offend anyone who has BFG's and likes them, but I wish I'd never fitted them to my DS. The KO2s are a very good off-road tire, but it is that very toughness that makes them unsuitable for a lightweight soft roader like the DS IMHO. The tire fitter did warn me they weren't really suitable for my car, but I got them anyway. But turns out he was right - they were difficult to balance (the DS is very sensitive to rotating mass even a little out of balance), noisy on the road, have killed my MPG, and have a very stiff sidewall so give an uncomfortable ride.
I now wish I'd got something a little less hardcore, with an aggressive tread that looks the biz and can take a bit of off-road, but a lighter and more flexible carcass that's more suitable for a car like the DS.