Welcome to pain.
I pondered the same problem. Turns out there's not a real good solution for running Azenis on your 16x6" wheels. It is possible to squeeze some on, but they are 225/50. In short, you will look like a tractor... don't imagine it's very safe although the size chart says it works on 6" at the smallest, and you will scrub like hell. I don't know if the Dunlops will fit, either. 205/50 is a pretty funky size, so good luck finding anything. I ran (old) G-Force sports and I wasn't very impressed with them at all. My old Nitto Neo-gens seemed to do better, but they are 10mm wider so it's not exactly a controlled result. Best way to solve your problem is probably to see if you can find some 16x7's because you can't fit steel 15's on your SVT.