Well, I bet you are pretty determined to lower the car so just try it out. It will be bouncy. You can tell
us how bad/good it is when you do it.
I suggest you cut one and a half coils off. That should give you a good drop. I used a hacksaw to cut my Intrax rears. It took some good effort but it worked out perfectly. As long as you do it by yourself, then you don't lose any money and it's worth it because of the experience. Taking apart the suspension is fun and pretty simple. Good workout.
But don't pay for a shop to take apart your suspension and cut the springs because that's a waste of money.