Audio Research Mark 1or 2, Super Tubes or rolling?

I am putting together an AR system and opinions are very devided about the newer AR equipment that uses the new "Super Tubes" or rather their older mark 1 components that are designed for tube rolling. Which sound better? I know that is a relative question. I have heard both at different times, but never done a side by side comparison. Some like the warmer, more tube sound of the Mark 1 series while others like the newer sound of the newer Mark 2 components. I would like some opinions of which you prefer and what your experiences are with the newer and older AR series. Thanks.