The way one should approach this is via incremental bitching. Start by pulling out everything and re-wiring muttering to yourself about "this no good system....." But don't make it obvious. You're just in the seeding stage. Do a few more "re-wiring, re-amping, re-SPL'ing, re-something'ing" with little more emphasis on "geesh, if only I had XYZ system" But again, subtlety is what you're after.
Before you know it, she will take pity and allow you to upgrade
As my friend once said as he was eye'ing a new laptop (with is wife next to him)..."man, if I had that, I'd get some sh!t done! yeah, I'd get some sh!t done!"
