Congratulations Ken on the resolution of a very difficult choice. I think hOughy tipped you over the edge in the right direction

. You won't regret it further down the track as your OTA's get bigger. My HEQ5 was just coping with the Tal + other bits for astrophotography.
I just weighed both heads and the EQ6 came in at 16.5 Kg (36lb) and the HEQ5 was 10.5 Kg (24lb). I had no trouble with lifting either but then I practice with slabs and boxes of VIC

.
You should get many years of use and it should handle most OTA's for astrophotography.
Bert