Tires Falken or Kumho

660 is good bang for the buck. Not as fast as the top tier tires but two or three times the lifespan.

Falken Azenis RT660 or Kumho Ecsta V730. RT660 might be a smidgen faster, but the V730 is more durable and will last for more runs.

I went with fallen 615+ not the fastest but should last a good number of runs

I'm in a similar boat as you I did the 615k's last season. Personally I am overly pleased with these tires they have been everything I've wanted them to be. And I'll probably get another set of them this year.

The 615k+ is a great budget tire. I did my first season on them and got second place in my regions rookie class. Then, I kept them and still use them for less competitive/ higher run count events. I've done 3 schools on them too. I love these tires. They're fun to drive on, take heat well, and just last. They do amazingly well in the rain also.

They are Falken Ziex ZE950 A/S

I've never had a more tenderfoot set of rubber on any car and was really glad to have worn them out. Replaced with Kumho tires which ride like a noticeable harder compound/tire and have had no punctures since.

Had Falken RT615k+ previously and they're great fresh, but you won't get much mileage (11k mi) out of them and they pick up punctures easy with how soft the compound is.

I don't like the Falken Ziex that comes with the 17 inch wheel.

Falken RT615k+ on BMW 135i here. They are toast with less than 5k miles on them.