The drag racers love 'em cause they're cheap.
They burn through rear tires super quick, and the Shinko's are essentially throw away tires.
About the cheapest premium multi-compound tires are Bridgestone and Continental.
Both are usually within around $10-20 of each other.
The old Pirelli Diablo single compound series (which is still being made) are a very good inexpensive tires.
I ran them for years with no complaints, and currently have a new set on my 'Busa.
The complete set was only $190, rather than $200+ for just a rear.
I'd see if anyone is having a sale on these.