My E converted D8 weighed in at 8.6 lbs with a 4s 5000mah lipo and vorza body. Downsizing the motor and lipo might bring it under 8lbs.... but not by much. I have played with smaller motors a bit, but my esc at the time needed a BEC to run anything less than 4S.
Compared to my slash 4x4, the extra weight goes into the contol arms, diffs hubs and uprights. Its probably in the 6.5lb_7lb range with a strc chasis, tenshock motor, vorza/d8 and 2s 5ah lipo. I'll get a weight on it tomorrow... if I remember to bring it to work with me.
This hobby keeps me pleasantly distracted from my more expensive projects... (1:1 cars, house, wife, kids, etc...)