You might want to check this out:
http://www.aronovaudio.com/reviews.html
You don't need mono block power for your 6.3. The little brother LS-960I has more than enough power for them. You don't need pre amp either. I used run 30 watt tube amp with 6.3 without any problem. I currently own LS-960I in my 2nd system and I'm in complete agreement with the review. My primary system is built around high powered SET.
http://www.aronovaudio.com/reviews.html
You don't need mono block power for your 6.3. The little brother LS-960I has more than enough power for them. You don't need pre amp either. I used run 30 watt tube amp with 6.3 without any problem. I currently own LS-960I in my 2nd system and I'm in complete agreement with the review. My primary system is built around high powered SET.