I did see that even Sweetwater is currently out of stock on the T8, for now anyway. I have Eris E5's and I pondered the T8 vs T10, but ultimately spent 70 bucks more for the T10's and have NO regrets. The T10 is more configurable on the back to get the right balance, but the provided footswitch to turn the sub on and off to me is worth its weight in gold if you live with anyone else in the house, lol. I use the Studio 192 Mobile as my ONLY soundcard (iTunes, YouTube, everything plus Studio One) and sometimes the deep thump isn't always necessary. Just my two cents (plus inflation and sales tax). ;-)
https://www.sweetwater.com/store/detail/TemblorT10