Hypocrit??? Uh...ok...
Anyways, your argument doesn't make sense. The reason people swap different motors into their car is obvious, TO GO FASTER!!!!! As far as just buying the car that has the motor in it, yeah you could do that, but then again, let's say you want an H22-powered car. The Prelude is a heavy car, and a nice H22-equipped one with low miles in good shape is expensive. Instead of buying the Lude, you buy a DX Civic for cheap, buy the engine and tranny, install it into the Civic, and be much faster than you would have in the Prelude. Also your car will be a sleeper, nobody will suspect.
Comparing an engine swap to a front end conversion is retarded. It's like apples and oranges.
As far as better looks, weight savings, and "keeping it in the family," you can achieve all of that by just keeping the stock front end, and adding a few nice touches (nice front lip, fogs maybe, aftermarket headlights/corners, cf hood, etc.). There's absolutely nothing wrong with the stock 92-95 Civic front end. Why make your car look like a half-Civic / half-Integra bastard???
And I think my point about buying an Integra in the first place is very valid. Yeah, you can do the front end conversion, and you can swap to a better motor, and basically build yourself an Integra out of a Civic, but FREAKIN' WHY?!?!?!? You'll spend a crap load of money doing that, when you could have just bought a car with the front end that you wanted, a better motor than the Civic comes with, a better suspension, and rear disks, all of that right off the bat!
Any way you look at it, the only reason for doing something like this is just so you can say "look at me, I converted my Civic to an Integra front end!" If that's what you want to be able to say, then go for it, otherwise, just buy the damn car that you want from the beginning, and save yourself the hassle of all that.