I own a 1993 Honda Civic LX (SOHC), and I am wondering how much difference is there really between a SOHC, and of course the DOHC? The SI of course is a VTEC, but really when it comes right down to it, what really does the VTEC do that non VTEC Civics don't? I am asking this, because I am interested in selling my 93 Civic next year, and just want to know what the best to get, and I am looking for something 10K or less. I love my car, but it's pretty old. I would much rather drive a newer car, so I don't have to windup replacing everything all over again. It's a real pain. Thanks! Janos