new CD receiver and speakers in 04 V6 SE

[dronek1975]

Hi
for some reason my factory CD player stopped working and since i spend over 3 hours a day in a car radio just doesn't do it for me. At first i have purchased single DIN Alpine unit from Crutchfield but with black face/bracket i came to a conclusion that it won't look got in this car, at least not for me so i decided to go with double DIN JVC CD receiver and silver face plate/housing to go with it.
What do You guys think of this unit...JVC KW-XG700 ?
Now speakers, since i don't have JBL in my car (it's 2004 V6 SE) I'm thinking of replacing all four speakers as well but i have heard there is some size limitations like certain depth of 4 inch? I've found this website onlinecarstereo.com they have a lot of 6x9inch speakers but i'm worried if they will fit especially in the door. I'm not big audiophile so i don't want to get crazy about it, just decent inexpensive set up is all i want. I kind of like these speakers and they are on sale but i'm not sure if they would be direct replacement for factoy ones...Blaupunkt PSx693N. I especially need help on a speakers...chep and good at the same time.
Thanks