Nice quads, we have a guy on a DS650 in our group but no YFZ450s as they are too race orientated for the kind of riding we do which often involves over 150 miles in a day, a lot of which is on road between trails, the 700 Raptor is easily the best for this as it has a very relaxed and flexible engine, the race type quads are too revvy on the road cruising at anythig over 50mph !
We have guys on many types of quad, KTM 450, Kawasaki 450, Polaris Predator and Outlaw, Suzuki 400 and 450, Honda TRX700, Can Am renegades and Outlanders and Quadzila 450s, but for sheer reliability and overall riding the Raptor is king .
Our web site;
Quad Biking in Berkshire and Hampshire, Trails and Greenlanes. Quad Trails Association.
Its more of a fun quad related site than a dedicated quad site, many of us have become good friends and we ride out every two weeks .
I had a quick look at your `quads for christ` site and to be honest its not for me, well it wouldnt be as I am an atheist, but good luck to you and long may it give you pleasure .