That depends on what you want. Performance cats, Magna Flow, Borla, as for OE, IMO there is not that much difference in them. I never buy the cheapest anything, and I wouldn't buy the cheapest cat ether. Another thing is how strict is you state inspection. Do you need to pass emission testing?
I don't know but I found BORLA products substandard as the two Borla mufflers I installed on Toyotas lasted about 2 years. I guess thats why they so cheap. Went with Walker on last muffler.
No cat on my truck.