Progressive Thrash

Betrayal from US
Defcon 5 from Germany
Dyers Eve from the US
Mekong Delta from Germany
Vektor from the US
 
I assume you meant Toxik, didn't you?

Another two recommendations not mentioned yet:
Watchtower
Sieges Even - "Life Cycle" (whereas their other albums, while definitely being progressive, hardly qualify as Thrash Metal, well, maybe a few parts here and there)
 
Thanks for the recommendations. I forgot about Forbidden...I quite liked them back a few years ago but haven't followed them since then. A few years ago I also found Psycrence, and their album A Frail Deception. This is a very strong progressive thrash album in my opinion.