Coilovers and Springs (Pros and Cons)

[Vegasboricua]

I've been doing alot od reading. I been trying to decide wether to get coilovers or springs. I wanna know from someone who know alot about suspension. I don't plan on tracking the the much if at all. I would like to keep the ride quality somewhat the same, not too much stiffer than it is now. I've had cars with springs but Im unsure what they were. Could someone please shed somelight on this topic for me. If i could save myself a few thousand from buying a coilover setup thats always nice. There is just such a hug difference between price. I just want to know if there are any true benificial advantages to coilovers over springs.

Thanks guys!