I don't own one of either, but would expect the Kimber to be the better gun. People like to hate on Kimber, but I have never had any issues with mine. I have also never had any problem with my R1's, but I just can't trust Remington anymore to put out a quality product.
I wouldn't have a problem buying the Remington if it's price were in line with the other models, but at almost a grand. I'd opt for the Kimber.
Dan Wesson makes a nice longsilde, but it's nearly double the cost of the Kimber.