If you show your car, maybe the Coker tires work. I wouldn't want to really drive on them beyond mild cruising speed.
I'm guessing the Federals are the "Formoza", which is not exactly a performance tire, either...if that's a consideration. Federal does make some good tires (I have a set of 205/50-15 595's on my car presently that I've been asked to try) and they are great bang for the buck.
The Toyo RA1 205/60-13 would be my first choice, if I was running 13's, hands down. Yes, they are $150/corner. But, I'm happy to spend extra for good grip on my Tiger
edit: It was pointed out that I missed the fact that the Vredstein is not a typical "show tire" and is actually a continuation tire, based on an older tech performance design. So, I was off base in my comments, for sure. I still would run the Toyo, if I was on 13's. There have just been too many improvements to carcass construction and compounds. Only thing, if running grippier tires, items like leaf spring mounts and bushings/ball joint condition become considerations.