Against my better judgement, I'm going SLi with two ACX 2.0+ (mainly because my step-up is forcing me to). I've got some pretty good case ventilation and my CPU radiator is sucking cold air in from outside the case. I really like/liked my 980FTW ACX 2, so we'll see. Always only ever ran blower-style in SLi, but I'm sick of that hairdryer jet engine they both make. Worse case is I can't OC the two 980Ti's as high - not a big deal.