Knowing from experience get the B20. Or just get an A20 factory replacement, rebuild and build it up for boost. A20s are very tough little engines, and can hold up to 10 lbs of boost on a stock healthy engine. Some A20s have even made it in to the 9s runs. Heres a link to one of the most helpful sites you will ever find for the 3gee. www.3geez.com I've been a memeber since I got my accord and it has helped me a lot.