Hard to go wrong with a DNA 75 for SS TC. Lots of mods do TC as well, but the DNA board sets the standard, and the eScribe software makes customization easy. That said, there are other mods out there that do TC with SS well, from the RX200/200S, to even a Coolfire 4 75W and even a 100W Presa. I expect the Alien will perform well, but I haven't received mine yet. It comes down to how much of an investment you want to make.
And before it all seems way too expensive, be aware that sales can be found. I picked up my DNA VT75 for $50 on sale.