first off two eight inch subs is awsome!!! yea sure 2 10in would be probably a lot better but with the 5.1 systems y would u want it the 2 eight inch subs that come with it rattle windows in ur house that more than what u need i mean hell what yall people wanna do blow the windows out of ur house??? lol! if u want to then i would suggest doing what i have done buying 6 promedia sws subs. if u dont belive i want shake the ground then ur out of your mind my system want just rattle pics on the will it will knock them off so if you want more bass buy more sws's thats all im saying and i get yalls point too but hell i dont care whats out there if u got enough money to blow of course u can always buy something bigger and better period