i think that for a 4th gen civic, this is hands down the best swap if you've got a couple grand to blow. it is EASILY the most cost effective, as it's pretty much a $2000 60 hp/30 lb-ft of torque gain over the stock engine. with oem honda reliability, not aftermarket parts. sure, you can go b18, you can go LS/VTEC, you can go CRVTEC, you can go H22, shit if you wanna you can put a jet engine in your 4g civic/2g crx, but for a great swap without a great hit on the wallet, the sir1 is the way to go. (i have a zc, and for $700 installed myself i am VERY happy - fits real nice with a $7/hr budget.)