Hand Washing vs Car Wash Hose(High Pressure)

I was just wondering where everyone out here stood on the subject of hand washing or car wash(high pressure) for a car that is all painted pretty and is cleared? I personally always hand wash my car and chamois it afterward and I feel that this method is far superior to using a high pressure hose. Also on the same subject, What about using a buffing wheel on clear coat finishes? I never use a buffer on my paint. I prefer to just hand buff the finish. I was told that a buffer can cause swirls in the clear coat. What cha' think??????