My own system is the epitome of mismatch. I've got a Levinson No. 38 preamp fed by a Marantz CD5004 thru a Musical Fidelity V-DAC, and outputting to a Hafler 9270 driving a pair of large DIY 7" two-way monitors (a competent design, despite the DIY stigma) on Target stands.
I think Source First only makes sense if you plan to have several pairs of speakers on hand and swap them out periodically. I don't yet own enough speakers (hopefully of my own design) to do that, though.
