one of the reasons i suggested the outboard amp, that way u can run the 6x9s of that and the little 10cm jobs off the HU and turn the bass rite down on them without affecting the bass response of the 6x9s?
that make sense to you?
This is the reason headunits have a fade function, to provide the balance to what ever your most powerful speakers are.
Theres no doubt that its best to run your speakers of an external amp providing its of a higher quality, but if your just going to use cheap crappy ones then theres no point, your just wasting money, you can get full controll through your headunit and the quality will be the same, if not possibly worse depending on the quality of your headunit.
The rockford amps used on my system cost more than double the total budget of your system, and i would still class them as intermediate amps, certainly not top end stuff.
Rich