New Engine

Hey, i have a question...im new to this forum and so far it seems like this is the fastest way to get a response. i have a '89 Civic Si. which is a Hb. and my engine on it wont start. when i try to start it theres a thudding sound and theres also a rattling. it is a manual transmission. im thinking that the thudding sound is the timing belt. and a friend said that the rattling might be a piston which went out. what would be easier? going out and buying the replacement parts for the engine or buying a new engine? if its buying a new engine what type of engine that is in a reasonable price range should i get if i want HP? thanx

Also if it helps my car is a 1.6L

I just wanted to let you know that you are not that far from me at all. I live in Sonora. You should come over and visit sometime we have a small crew over here.