you may not like the 4x10 sound
as they have a smaller sub or mid depending on how you see it, but if your serious about it don't go cheap and you may even run a small sub if your wanting some low end sound with an amp. most aftermarket cd players have about 50 watts of power per channel which is plenty for most speakers. i'm just letting you know from experiance as i've done installs in car audio since 86. just don't go cheap, if you buy cheap that's what you'll get. don't know why you don't want to go with 6x9's but that's all you. just think it though and the 6x9's won't be visiable but will give you great sound.