well are you trying to use certain manufacturers? like only brands you can get your hands on or is this an im open to ideas kind of thing? i kno we focus on two different aspects of car audio but id love to give some input. iv gone a more simple route with my set up too, cutting out my EQ which i have not seen any real difference in tuning vs the pioneer HU im using now. id love FI/ascendant audio try there lower line like an assasin or chaos they produce a great sound on little power. is this going to be a sealed or ported box? try a bandpass if u can fit one in there, might help with the top off. i use pro audio mids (i kno not everyones cup of tea) but i hear there are some components out from ppl like addictive and other SPL oriented companys that sound good. i really like the range these db drive p55d (or something of the sort) carry, and the way they sound doing it.