Hello pal! I'm from Brazil, and I saw that you are using the front stage of my dreams heheh... I read bout your topic, and I'm almost going for your solution, but without the tweets... I'm a heavy/prog metal/rock fan, and some electronic music (my girl loves it)...
My setup is like that:
Sony HU for now(good sound, but no T.A. or 3-way), i'll upgrade it in the near future...
a/d/s 4 channel amp for the whole set (2x 50 RMS + 1x 180 RMS all 4 ohms)
single JL 10w0 old school sealed 25L around...
My doubt is if the a/d/s amp can push the bridged subwoofer + 2 SLS6 + 2 Founteks...
Will I have a good SPL with that setup? I'm not a basshead, but I wish a punchy sound for my rock'n'roll/metal tracks...