My only experience has been with ATI and I love them. They are pricey but have only ever bought 2 in 8 years. I have an 8" race converter that I have run in everything from a 440 to a 511 big thumper and had great results. Then I have a 10" street/strip converter.

The thing I like about ATI is that for 125 bucks I send it back and they freshen it up. Have only done that once in 8 years and when they called to tell me they opened it up they needed to do nothing to it.

The reason my experience is limited to ATI is they have problem free.

AJ