welcome to the site also, search button my friend, look for the stickies at the top and use that button great little tool, dont mean to be an ass or anythign just lettin u kno
K series. Just can't go wrong. I've found several K24s near me for well under a grand, and being that you have an EG the swap will be fairly easy if yer the DIY type. Shouldn't take much more 'n a day if you have everything you need.
*edit* That's what I get for posting before reading the full post lol. A 94 civic will have either a D15B7, or a D16Z6 ( I think ). That link will sort u with all the info.
i myself have a 94 civic since a long time and these cars are simply perfect when it comes to daily usage. low maintenance, high mpg and very few repair issues. you can find good info on this site and hondacarforum if you want to get.