SO would be nice, just pick the longest layouts. Saying 'no' because it would be mayhem is stupid, as it's our own fault. Just be careful, or ban those who oppose to race cleanly.
TBO + [STD or LRF] would be good, as it would FOX + [FBM or FO8]. Maybe even LX4 + LX6.
I wouldn't mind KY2 or 3 as well.