When I was younger and determined to spend only a fixed amount on an audio system I tried rigs like the OP is suggesting. My chief priority was the budget/cost. I was quite confident, but delusional about the potential of such systems. They are fun, but essentially one does not get superior results, just more of the mediocre performance, which is interpreted as vastly superior. The mistake that is then made is thinking that somehow it has leaped into the territory of big gun setups. It hasn't. We don't know the chief motivator for such a setup, but when someone makes a comment that they can achieve better sound than higher priced rigs, often the wallet for whatever reason rules the agenda.
DIY line source type (stacked, double) setups are fun. But, there is a big price paid in terms of overall cleanness, quality/precision of the soundstage, focus on the center image, L/R channel separation, potential comb filtering, and tightness of bass, etc. Basically, while it yields more macrodynamic impact it messes up a lot. As long as the OP realizes that he is giving up some characteristics associated with better sound, who cares? He can mess around with the rig as much as possible. I did lots of experimental rigs and I am very glad I did, as it taught me so much about the potentials and pitfalls of systems.
Our man here may be a System Builder, such as myself. Perhaps he loves recombining gear to see what results. The variety is what fascinates and gratifies me. So, ishkabibil, if you are drawn by curiosity, have at it. But, know this, despite your strong protestations, you will not be moving toward higher quality sound overall. That simply takes better gear and methods - and yes, much more money than such persons may be willing to spend. If they do not hear better gear in their home it is doubtful they will ever be convinced of the efficacy of moving up from others explaining it to them. :)
