some Infinitis. As far as Bass, Boston Acoustics or a 6.5 is not really intended for bass.... bass support maybe but not all out bass. I have 2 sets of Boston Acoustic seperates and I love em. I also like the Infiniti seperates also as well as Focal... but the $ isn't comparable to what your looking for. I would just go with lower end Infinitis, they aren't bad for the money. What else are you planning on running and is all of it going to run off your 4 channel?