Hi,
Be careful with the Parada's, especially in 195/50/15. I've tested them on my 172 mk1, for trackdays in december. They are very good for the first laps, but as soon as they start to heat up, the sides become very soft and you loose lot of grip on front wheels. These could be much better if the sides were stronger. Maybe in other sizes like 205/40/16 these are excellent, but in 195/50/15 I would not recommend these for trackdays.
I've tried the Federal SS 595-RSR and I've been very happy with these, even under rain. Sides are stronger. For the price, I strongly recommend these. Never tested R888 or A048 that should be even better, but too expensive for me.
Cheers.
Michael.