Stay away from that Ebay Package..... :S yuk. The selling point they try for is the power output. 1000w 6x9s? ohh hell no. They fool you by telling the PMPO output (power music peak output) which means nothing what you want to look at is the RMS rating. Unfortunately with audio gear you kinda get what you pay for so the cheap usually sounds and performs cheap. (sony = average to bad) As for head unit make sure it plays all you want to play (MP3) and if you can afford it get something with a 5v pre out or maybe 3v because this will give a good strong signal to the amp esspecially if it has to travel the length of the car. when looking for bass also not the Box spefications and also the cone depth will change the punch of the sub and these days the Duel Voic coils are the way to go for subs. I would also make sure the Front Splits and the head unit are the Best Items you buy as they will effect you the most. I hope this little bit of info will help you with your choices. (My personal favs are Focal splits, Alpine headunits & Amps and Eclipse Subs)