1: What is the Year, Make, and Model of the vehicle. - 2008 Ford Mustang coupe
2: What is your budget? $600
3: What exactly do you want your outcome to be? (Good sounding music, or loud bass?) Good sounding music
4: And specific sub sizes that you prefer more than others? - Nope
5: How much trunk space do you want to use up? - The less room the better. No limit though.
6: What type of features are you looking for in a CD Player (aka Head Unit)? (Ex: USB, AUX, BlueTooth, etc) - Front usb and aux.
7: What type of music do you listen to? - Billboard top 100
8: Is your stock stereo system amplified? (You may or may not know this) - Don't know, but don't think so.
9: Do you have Steering Wheel Controls? (Volume/Seek on the steering wheel) - I do not

This is what I have in mind at the moment:
Head unit - Pioneer FH-X720BT 2-DIN CD Receiver with Mixtrax and Bluetooth $98.00

Amp - Sound Ordnance M-2250 175 two channel $130.00

Speakers - Alpine SPR-68 6x8" Coaxial 2-Way Type-R
Speaker Set $112.00

Sub - P300-12 Punch 300 Watt Powered Loaded 12-Inch Subwoofer Enclosure $185.00

How am I doing?

id steer away from powered setups like the amp+sub powered ones. they tend to be somewhat ugly sounding.

i have a old alpine vpower mono block amp pushed 2 kicker comp 12's back in the day if you want to use that. just pay shipping i been tryin to off it for a while does about 700 watts

this is the amp. cosmetically maybe 6/10 but works youll just need 2 20 amp fuses and 1 extra terminal screw if you want to use both sets of pos and neg. but wont matter if you use both or not mono channel 200 watts rms at 4 ohm or 350 wats rms ar 2 ohms

http://www.crutchfield.com/p_500MRPM350/Alpine-MRP-M350.html?tp=115

why does steering wheel controls matter?

Love it

Not bad man i love it

As far as the Alpine type R's are concerned you cannot as for a better speaker for the price. I run 2 sets of 6x9's in my truck powered by a kicker amp and they are amazing. One tip for your door speakers....apply Dynomat it makes all the difference. BTW stay away from powered Sub+Amp Combos they suck. Spend the extra money and get a pioneer 10" with a cheap amp...

the type rs are great but personally i wouldnt ever go with coaxials again.
me and 2 other friends all got the coaxial type rs and the center tweeter kept coming loose.

other then that they are really nice.

Yeah with alot if bass that happens. Especially if you mount them in the rear deck factory location.

so what do u use now if not type r"s