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. They ship out in just a few days (21-30 of April), and even though customs may be a bit of a hassle it's still better than paying double for one.