look at it this way... go with a b-series if you want anything fast with a reasonable amount of torque without going turbo. the b18's have a good amount of torque stock, so i'd recommend the a1 for a cheap swap... otherwise go with the c1 or the c5 for a more expensive fast-ass ride. if you're willing to put a little work into it, get a b20 and get a new tranny, intake manifold and some other minor parts, and you'll have a good motor with a boatload of torque and great potential for a turbo'd civic.