Flip Kit lowering for a leaf rearend

[tomatocity]

Finally decided to use a Flip Kit to lower my truck 5" in the rear. This seems to be the most economical barring any unforseen issues. Here are a couple of questions:
-Will the frame need to be C-notch'd?
-What is the best Flip Kit?
-Do I really need a Flip Kit or can I use two new extended spring perch's?
-What are the flaws to lowering using a Flip Kit?
-Will I need shock extender brackets?
-Can I remove the bottom leaf (flat leaf)(five leaf spring) without a problem?
-Are there any other things to be concerned with?

I plan on lowering the rear first. Then I want to lower the front to match the rear using drop spindles and lowering springs if needed. Any suggestions or criticisms are appreciated. Thanks.