noob system set up, advice needed

first let me start by saying i plan on upgrading my stock stero in my 1994 integra.

before i buy anything i want to do my research and make everything will work well together. here's what i plan on buying for sure

Alpine 9886 HU ,Alpine SPR-17s components and some used 12w0 jl subs from my buddy 

what i want to know is what should i use to power everything?

My first thought was a Alpine MRP-F600 to power the components up front and get some 100w rms Alpine 6x9's in the rear. Plus a MRP-M500 for the subs.

My second thought is alot cheaper... Use a MRP-F600 in 3-channel mode producing 2x100W rms and 1x300W ms for the components up front and the subs, and just run some 2way SPS-5002 off the HU in the rear.

any feedback will be greatly apreciated... and i know there is a HUGE price difference between the two options, so would there be a big difference in sound in the car? i should state that im not looking for too much out of my system, just something enjoyable on my daily comute, oh and i should add that i mainly like to listen to old school, rap, and sometimes spanish music