I just bit the bullet guys... I have one of these bad boys (FK60) and a Mark 8 fan headed my way. Since DCC is about 1-2 weeks behind I might not get to install it anytime soon but... pictures will be taken, and words of love and joy will be typed once the install is complete.
I know the FK60 is a slight overkill for a mark fan but I never know what upgrades will come in the future. No reason to not upgrade for the future possibilities and extra margin of safety when it's only another $15 right now... versus an extra $150 down the road.