So how is my new system going to sound?

i drive a saturn and im poutting in an entire new audio system, in the doors im putting in the alpine sps 600 speakers with an alpine mrp m500 amplifier putting out 150 rms up front per speaker. in the rear deck the same speakers are going back there but im putting a kenwood kac8104d which once again has 150 rms per speaker. in the trunk im putting the mtx thunder square subs powered by the alpine mrp m1000 so like do u think its going to sound goos im worried i spent a lot of money and it might sound like crap so help please?