Are the T9+'s a good investment at $1500 including shipping. They same to be quite more reliable than the S9.
Not at 1500 considering they were selling for less than half that if you had a coupon, and they're still in stock direct from Bitmain. I'd suggest trying to find a coupon and buying direct from Bitmain, as they are currently going for $771 with a PSU.
I'm sorry I meant 1150$. With cost per kWh around 9cents