Jeff,

You might want to look at Hirobo's Astral X-60. 2,65 kg with ys 63, overkill undercarrige/servos/battery and MK dual coupler. I'd say it's possible to put it together at 2,4/2,5 kg if you go light on equipment.

If you want to build - MK Synergy/ys63. A friend flying it at 2,4 kg, but he's building light.

Boysnake