Those particular Conti's weren't an option at my local Discount Tire; although I did ask about them. The closest Conti that I could have chosen was the Control Contact Sport A/S, however, the price difference was beyond noticeable. The Conti CCS would have been more than twice as expensive as the Falken's. I would have preferred the Conti name and the Y speed rating, but not at that price difference (considering that they're both 106XL load rated). The Hellcat is my daily driver, and I do not track (or race) the car, so the H speed rating is more than sufficient for my purposes. If I am going 130 mph or higher on public roads, I will have more issues to deal with than exceeding manufacturer limits on the tires.
As such, I got the Falken Ziex S/TZ05's installed earlier today. Total out of the door for all four was $609.xx including tax (8.25%), a road hazard warranty, and 50k mile manufacturer warranty attached to them. It is 40* and pouring rain here, so handling performance was (clearly) not tested. What I will say so far, from 20 miles of driving down the highway in pouring ass rain, is that these tires do a great job in the water at speed. I felt firmly planted to the ground, wet braking was great, and they did inspire confidence; hopefully that attribute remains even though I do not see much rain driving in Texas. I did rather enjoy seeing all the water being thrown up behind my car as I was driving; juvenile but amusing.
I can tell a difference in the ride, which was to be expected by going to a harder compound (and SUV tire), but I also believe that the cold temperatures may be exacerbating the perceived harshness (which is not uncomfortable, just noticeable). Once it warms back up in the next week, I imagine that it won't be quite as noticeable, but we will see. If that's just an attribute of the tires, it is something that I will easily get used to.
I am looking forward to things drying up so I can check the dry handling, but I assume that for my purposes they will be more than sufficient.