I'm very new to car pc's and i was reading up on a few different ideas. ive seen people use a raspberry pi system, or a tablet system and i'm stuck between those 2. i want it for control of led's, windows, video/music, so i don't have to ether hook my phone up or use cd's all my music would be on a hard drive of some sort. i just really could use some advice on what way i should go rather it be the tablet, or raspberry pi. Any other ideas would be greatly appreciated as well.

Btw, my car is an 05 Nissan altima SE-R.
thanks for any help in advance!