Difference in drop spindle, and drop springs

I know very little about suspension, especially the front.
Whats the difference in a 2inch drop spindle, and 2 inch drop springs. I assume the spindle would keep a factory ride quality, and allow longer spring travel?

Thanks guys, just looking to go a little lower

Thanks guys, thats what i figured.
I was thinking springs were the short cut
Looks like ridetech has the market corned, or at least the only people jegs sells.
$300 for a 2'' drop at summitracing.com. Any other options? Im sure since its just a spindle, it dosnt matter too much.

Turbo: thanks alot, man. People often say it looks like a copcar, and thats one of the reasons i havnt lowered it, cop cars dont sit low, but i think it'd look mean.
I also like being able to drive the hell out of, and not have to worry about bottom out everywhere, and scraping exhaust like some of these lower guys.