Nothing made in Japan? IS, Q50, TLX?
Yeah, I'd go for an IS over the ATS. Last time I did a "build" online, the IS350 F-sport came in just under $50k. That's a very good value in that category.
But with the IS, you lose one of the benefits of the ATS, which is and I quote:
"Plus, you can get it with a manual gearbox, which you will, because you’re awesome."
The Lexus site had a RWD IS350 F-Sport at $51,700 but there is a $1500 discount right now. While a full loaded ATS turbo with 6-speed can be priced north of $50k, it starts at a hair less than $40k. A base model with CUE, and a sunroof sets you back $43k (with no credits though).