You are gonna want to put in a 4 ch amp because the majority of receivers only put out 50 w peak which I think might be somewhere around 12 w rms but I may be mistaken, and most speakers will probably take atleast 50w per speaker. Also for the 2way 3way, it's your choice, but component sets are probably the best way to go, but they are a bit more pricey compared to coaxials. Shop around on crutchfield.com and sonicelectronix.com and see what's in your price range. I would also suggest purchasing your wire harness online since it will probably be cheaper than in a store, there are a ton of threads about which harness and dash just so don't be afraid to
search.
http://www.355nation.net/forum/showthread.php?t=108913
There's one thread.
http://www.355nation.net/forum/showthread.php?t=76362
And another
search.
http://www.355nation.net/forum/showthread.php?t=108913
There's one thread.
http://www.355nation.net/forum/showthread.php?t=76362
And another