First build research

Whats up guys i already get it noob noob noob no worries it is what it is. Im doin my 93 gmc diesel ground up all out front yard build starting with the inside. Goal is 8 speakers 2 subs.. 4 (4x6) rear pilars and dash 4 (6 1/2) custom glass console and doors. 2 12s under back seat after i rais the seat for clearance. I have read an assload of the help 101 an random question threada on speakers alone. I already plan on sealing the doors with sheet metal and silicone my grey areas are in the components. Whether to go with 2 way 3 way what ohm can you run 8 speakers off one amp or should i go for 2 smaller amps. I would like to put the speaker (not sub) amp/amps in the console. I left the front of it were it meets up with the dash open for air. I also have a dual double din dvd navi in the center of the console. Would 1or2 amps and head unit inside the console be too much heat even if i ran some sort of cooling fan setup. Im not looking to push thousands upon thousands of watts i just want it to be loud as hell and balanced with decent bass... As far as power is concerned my truck has an oversized alternator and 2 batteries from the factory. Any thoughts opinions links on what ive got goin on would be apreciated otherwise ima cross my fingers an wing it